Category Archives: Soil

GreenUP Ecology Park Spring Sale

By Suzanne Seryck, Master Gardener

GreenUP Ecology Park Spring Sale – Saturday May 18th 2019

The GreenUP Ecology Park  has often been called a hidden gem, it has been in Peterborough in its current location for 25 years, but many people are still unaware of its existence. I first discovered the park approximately 8 years ago when I was researching native plants. At that time I wanted to plant a large perennial bed filled exclusively with native plants. I spent all winter researching the plants I wanted and where I could buy them locally and came across the Ecology Park and better still discovered they were holding a spring sale.

I dutifully arrived on the day of the sale 5 minutes after opening only to discover a very, very long line of people all carrying totes, boxes, bags, anything that could be used to carry plants. Even though it was incredible busy I was able to find almost everything on my list with help from the many knowledgeable volunteers and staff that were on hand to help. I was quickly and efficiently processed through the payment line, and was soon on my way home to start planting. The quality and choice of plants was extensive, and I knew then that I had found something special. I have been returning to the Ecology Park every year since either as a customer or as a volunteer.

plantsalecourtesyofGreenUpFBpage

Native plants are plants that grow locally in a particular area. Whether you are planting an entire garden of native plants or simply planting one or two, the benefits are numerous. Native plants tends to be more hardy to the local conditions, needing less watering, and next to no pesticides or fertilizers. They can improve air quality, help in managing rain water runoff and maintain healthy soil as their root systems are deep and help prevent soil from compaction and erosion. Native plants provide both habitat and food sources for wildlife, as many native pollinators rely on native plants. There are numerous interesting articles on the internet detailing the benefits of planting with native plants – I have listed a few below. There are also links to two other native plant nurseries (in addition to Ecology Park).

Why Native Plants Matter
Benefits of Native Plants
List of Native Plants in Ontario
(from Ontario Wildflowers – a comprehensive list)

Native Plants in Claremont
Ontario Native Plants (online only – ship from Hamilton)

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This year the GreenUP Ecology Park Spring Sale is being held on Saturday May 18th from 10 am until 4 pm. As well as trees, shrubs and wildflowers you can also buy vegetables and annuals at the sale along with compost, mulch and wood chips, but make sure you bring your own containers to hold the compost or mulch. A list of available trees, shrubs, wildflowers and grasses is available on the Ecology Park website.

Children are welcome, even encouraged. While you shop there is a large children’s play area complete with a willow trail and cedar maze to keep them entertained. Be sure to check out the latest addition to the park, the new children’s education shelter which has been built using sustainable practices.

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And finally, the Peterborough Master Gardeners will be on hand wearing their red aprons between 10 am and 2 pm to answer any gardening questions you might have. Be sure to stop by and say hello!

Seed Starting Tips & Tricks

by Mary Jane Parker, Master Gardener

I have been starting seeds indoors since I was a kid. This was probably the fault of an early teacher for introducing me to Dixie cups and bean seeds or half egg shells as pots. I have run the gamut of single grow lights to a full-fledged grow room with a 1000 watt metal halide lamp on a track – serious stuff. I currently make do with a 3-tiered system which gives me everything I need.

First tip – Pay attention to seed packet instructions if available. They contain the best advice possible for timing. Obvious but a lot of people ignore that.

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Choice of potting mix is personal and requires a trial and error mode to find out what works for you. I personally use a local product because I witnessed someone who owns a commercial nursery trotting out of a store with multiple bags. I thought, hmm, I’m going to try this and have used it ever since.

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Damping off has to be the biggest issue I have faced starting seeds early. There is nothing worse than seeing your wonderful little seedlings wither and die. For years I mixed No Damp with my soil when potting seeds for ornamental (not food) plants.

When this became unavailable, I started using very strong chamomile tea as a soil drench and spray. Seems to work for me. I have also at times sprinkled cinnamon on the soil surface.

Two other important techniques/tools for indoor seeding are air flow – I use a fan when plants are a few inches high. This really strengthens the plants. And before I even start, I sterilize all my trays, etc. because I reuse them for years.

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That’s pretty well it and then it is as Garry Edwards of Meadowview Gardens says “You might as well forget it if they dry out. Seedlings do not thrive on neglect.”

P.S. Garry Edwards suggested that seed packets do not always contain correct info. He noted many instances where they were totally wrong. He also concurred that air flow is important.

The Peterborough Garden Show

By Mary-Jane Pilgrim, Master Gardener

It’s coming in 25 days.  It can’t come soon enough.  In our city, “The Garden Show” is a true sign of spring.  It’s an occasion that brings together speakers, workshop leaders, vendors, horticultural society members, master gardeners, exhibitors and many others for one reason:  “For the Love of Gardening”.PGS-logo-small

This year marks the 19th fantastic show: 
April 26 – 28, 2019 (Friday 5-9pm, Saturday 10am-5pm & Sunday 10am-4pm).

And there’s great news ! The show has MOVED – to Fleming College’s brand new Trades and Technology Centre on Brealey Drive with lots of FREE parking and a $10, one-price ticket so you can enjoy the show all weekend.

The Peterborough and Area Master Gardeners will have a booth at the show, and will be happy to answer any gardening questions that you may have. Watch for our red aprons!

The theme “Coming Up Roses” is reflected in several of the amazing speakers along with educational and fun workshops and demos.

This award-winning show was honoured in 2017 with both a “Canada 150 Garden Experience”, and “Garden Event of the Year” by the Canadian Garden Council, so come and see what all the fuss is about.

You will find many of your old favourite vendors along with some new ones.

…and don’t forget the popular “Little Green Thumbs” Children’s Garden that is always teaming with liveliness and action! There are learning activities, face painting, crafts and even a take-home project. Their theme this year is “Miniature Gardens for Elves and Fairies”.

All the show profits go back into our community to fund scholarships for post-secondary students studying in horticulture-related fields,various local projects & Community Gardens.  Since 2002, the show has put over $200,000 back into our community.

Please save the date, visit and and learn why “Everything’s Coming Up Roses” in 2019.

Learn more about the incredible speakers, workshops, bus trips, places to stay and tickets here: peterboroughgardenshow.com.

 

Truth or Fiction? Are Black Walnuts Toxic in my Garden?

by Emma Murphy, Master Gardener

As a Master Gardener, one of the most common questions I get asked is about the toxicity of walnut trees (Juglans nigra).

“Well I heard that the juglone stuff in the roots kills everything and that I can’t plant anything under or anywhere near a walnut tree.”

Well yes Virginia, you can plant a garden under a walnut tree, and have it thrive. Let’s look at Exhibit 1 below – an established perennial bed under a walnut tree. It’s at our house, so I guarantee it’s real, and it’s been there since late 2007.

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Lots of lovely perennials here – hostas (Hosta spp.), daylilies (Hemerocallis), bearded iris (Iris germanica), summer phlox (Phlox paniculata), wild ginger (Asarum canadense), purple coneflower (Echinacea purpurea), ditch lilies (Hemerocallis fulva), although those last ones are doing just a little too well LOL. Don’t believe it’s a walnut tree? Here’s a photo from a bit further back on the street.

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Yes, she’s a big old lady – we think she was planted around the same time the house was built, making her about 140 years old. I think she’s getting a bit tired out – most years she doesn’t produce too many walnuts. Her slightly younger cousin is to the left of the barn in the background – LOTS of walnuts off her (and yes a garden under that one too).

So where does this fallacy come from that ‘nothing grows under a walnut’? Well certainly all parts of the walnut tree contain a chemical called juglone (heck it’s even in the Latin name!). Juglone is a chemical that affects other plants growing nearby (a phenomenon called allelopathy). Simply put, allelopathy involves “living or dead plant parts that release chemicals into the soil which have an effect on other plants—positive or negative.” For walnuts it seems like an attempt at self preservation, with juglone acting like a natural herbicide on other plants.

As Professor Linda Chalker-Scott explains in her recent (2019) peer-reviewed Washington State University Extension paper, damage to tomatoes and other crops near walnut trees in the 1920s caused people to believe that toxic chemicals were involved, and this perception persisted and became widespread despite there being no evidence (and this was before social media existed!). The US Department of Agriculture did field testing – no problems. When applied in a laboratory setting to seeds and seedlings it did cause stunting, wilting, and necrosis, but the specific way it did this was unclear. The most recent science suggests that juglone disrupts photosynthetic and respiratory pathways and interferes with water uptake in plants.

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So! It does affect plants – the laboratory says so. Well yes, and no. Field tests do not support the laboratory work, which doesn’t accurately mimic real life conditions in your average residential garden (again, for more detail read the excellent paper referenced above). Two very old University Extension papers (1973 and 1993) continue to be used to state which plants are ‘sensitive’ and which are ‘tolerant’. However these were simply observational papers—meaning that they correlate the presence of walnut trees with damage to other species but do not confirm a causative relationship. Neither should be considered good scientific evidence.

Gardening With Walnut Trees – My Story

I am sure the scientists, arboretums, farmers, and garden writers will continue to debate this topic for a while. Meanwhile, here’s our story. In 2007 I wanted a garden bed under our black walnut in my front yard. At the time I had heard the walnut horror stories, so I thought – well, how about I just don’t disturb the roots of the tree? (not a good thing to do when establishing any garden beds under a tree). I put good topsoil and compost down, making sure to minimize tearing up of the soil and roots, and planted, and watered, and waited. Things grew. Winter happened. Next spring plants came up. For the most part I just moved perennials that were already on site, although some hostas were new. Here’s the garden in 2008 in the fall.

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Fall asters (Astereae spp.), sedums (Sedum ‘Autumn Joy’ in this case), hostas (Hosta spp.), wild ginger (Asarum canadense), fall rudbeckias (Rudbeckia fulgida and triloba), purple coneflower (Echinacea purpurea), ninebark (Physocarpus opulifolius), iris (Iris spp.), astilbe (Astilbe spp.), sweet woodruff (Galium odoratum), Ozark sundrops (Oenothera macrocarpa), coral bells (Heuchera spp.), cranesbill (Geranium spp.). All doing just fine.

And 2009 below, in the spring. Irises (Iris spp.) lemon lilies (Hemerocallis lilioasphodelus), lungwort (Pulmonaria spp.), poppies (Papaver rhoeas), ditch lilies (Hemerocallis fulva), variegated solomon’s seal (Polygonatum odoratum ‘Variegatum’), bracken (Pteridium aquilinum), bleeding hearts (Dicentra spectabilis), daylilies (Hemerocallis spp.).

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Certainly, planting in general under walnuts is challenging – they cast dense shade and have extensive, water hungry root systems. Watering after establishment and for the first season is critical. We also had our walnut tree pruned professionally (it needed it) so it actually gets decent sunlight in the latter part of the afternoon. Like any fruit or nut tree they are messy, from their spring pollen to their leaves and nuts…oh those nuts.. 2017 was a crazy year – buckets of walnuts (I even had to engage my neighbours’ lovely children from across the street to help collect them) to 2018, with almost no walnuts. My trees are old too – although well pruned, their leaves drop at that first hard frost. 1

 

In Defence of Walnut Trees

Black walnuts are not all bad, and I will continue to treasure them in my yard. They are an amazing shade tree, are highly valued for their fine grained dark wood (for furniture), a great food source for wildlife and birds, and my white breasted nuthatches’ favourite spot to hide their seeds.

We have definitely had our challenges with our walnut trees, and I’ve learned a great deal over the past 20 years. But one thing I know – I can garden with them around. You can too.

Note: Black walnuts are not the only tree that produce juglone – other members of the Juglandaceae also produce it as well as hickory trees. Butternut, English walnut, bitternut hickory, pignut hickory, pecan, shagbark hickory, mockernut hickory are in the same family.

Caring for Your Houseplants in Winter

By Chris Freeburn, Master Gardener

For avid gardeners, winter months are a resting period with little to do but read about gardening and plan for spring. But we also need to take more care with our houseplants during this time as conditions in our homes have changed from months where windows are open and furnaces are not running.

To give your plants the best chance to stay happy and healthy, remember these four important factors.

Water

Most plants do drink less in the winter months so you can let them dry out between watering. However, plants like asparagus fern, anthurium, dracaena and ferns will still want to be kept moist. Check the soil an inch down or feel how heavy the pot is to be sure you are giving those plants enough water. Always fill your watering can and let it sit for a few hours before using. This allows the water to come to room temperature and also gives time for any chlorine or other chemicals to dissipate. Plants like jade, sansevieria, succulents and cactus will still want to be dry through the resting period.dscn6541

Temperature

Palm, croton, dieffenbachia and most tropicals prefer it warmer while ivies, wandering jew, cyclamen and jasmine like it cooler. So if you have your cyclamen in the same room as your fireplace, it might not be happy. Watch for drafts of cool air from open doors or from hot air blowing from furnaces. Many plants will suffer from this.

Light

Give your plants as much light as you can. That south window that burns everything in summer will give just enough light in the early months of the year. You may need to move some of the plants you keep in other areas to a brighter window. Plants like ferns, figs or philodendrons may want to be in that brighter spot. But be aware of how cool it is. You may have to move your plant back away from the glass

Humidity

dscn6545 (1)Most homes in winter are too dry for most houseplants and this is why we see them suffer by dropping leaves. To increase humidity, you can mist the plant, give it a shower (at room temperature – this also will dust for you!), or set in a saucer with rocks (elevate so the pot and roots are not constantly wet). Placing plants in kitchens or bathrooms where there tends to be more humidity is another idea. Plants that like it humid include ferns, palms, dieffenbachia and dracaena.

Fertilizing in the winter months when plants often rest is not recommended, however if your plant is actively growing with new sprouts, use a weak solution of water soluble fertilizer (20-20-20) once or twice a month.

It is also very important to have a good look at your houseplants on a regular basis. Besides removing spent leaves or flowers, watch for chewed leaves, spidery webs, or wet patches on leaves which can indicate pests. If you spot something, isolate the plant to avoid the pest migrating to the rest of your collection. Pick off the infested leaves, give the plant a good shower or gently wash the leaves with water or safers soap and get a good insecticide. Take your sick plant to the bath tub for a good spray. Remember to spray the soil as well as the plant as many pests lay their eggs in the soil. You can also use plant pest strips. These work very well for fungus gnats and other flying pests.

With a little attention and care over these stressful months, you can keep you houseplants happy and healthy and ready for the next season.

Garden Seminars & Workshops: Every Gardener’s Should-Do List

By Lee Edwards, Master Gardener

As Gardeners, we already know that gardening has many benefits including improving our health and connecting us with nature, to name just a few.  That said, did you know that attending gardening seminars and workshops can also improve your health- brain gain, ramp up your gardening skills, get you out meeting others with similar interests, and increase your communication abilities?  Even more, seminars and workshops add new ideas to your horticultural know-how, empower your confidence in gardening, and help to propel you to new gardening heights.

So, what does a gardening seminar or workshop look like?  Well, unlike lectures, they tend to be short, interesting, educational talks or demonstrations usually featuring a speaker engaged with a small group of attendees focused on garden topics of interest to the attendees.  During the event attendees typically get the opportunity to ask questions, participate in hands-on activities if any, learn something new, connect with speakers and increase their existing knowledge.

Indeed, during the cold winter as outdoor gardening slows down, attending a garden seminar or workshop is a great way to break up the long winter months away from the garden while remaining involved in garden goings-on and being amongst gardening enthusiasts.  The lively energy and creative atmosphere that permeates these events are infectious to everyone, worth the time and fee to attend, not to mention downright fun most-times.  Truly, garden seminars and workshops should be on every gardener’s yearly to-do list.  If you’ve never been to a garden seminar or workshop, now may be the time to try one, to investment in yourself, inspire your creative growth and add to your gardening knowledge.

Did you know that the Peterborough & Area Master Gardeners annually present a wonderfully fun and informative gardening seminar called “A Day for Gardeners?”

2019 Save the Date

A Day For Gardeners Seminars by Peterborough & Area Master Gardeners

A day of fun, friendship, food and learning.  Select 3 of 6 seminars presented by Master Gardeners and speakers on topics of interest to both new and experienced gardeners.

Date:   Saturday, March 2nd, 2019
Place:  Activity Haven Centre – 180 Barnardo Ave, Peterborough, ON K9H 5V3
Time:  10:00am – 3:00pm
Price:   $35 – EARLY BIRD (register and pay by February 2nd, 2019)
$40 – after February 2nd.
Includes lunch.  Walk-ins on day of seminars are welcome if room is available.

Have Fun Gardening!

 

The Myth of Fragile Roots Planting Trees and Shrubs

By Emma Murphy, Master Gardener

(This blog entry builds on last week’s excellent post by Sue Flinders-Adams)

“When you transplant, try not to disturb the roots, just take the whole pot-shaped lump of soil/roots and pop it into its new home.” How many people have heard this story when purchasing a new tree or shrub from a nursery?

We take a shrub out of its container and see white fragile-looking roots and instinctively we don’t want to damage them or add to transplant shock. We know that healthy growth in a shrub is dependent on a good root system, so why would we mutilate or injure them?

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Are Roots Really That Fragile?

Well, it turns out that those roots are not as fragile as we think. While you should take care with when transplanting seedlings, especially annual flowers and vegetables, woody perennials, shrubs, and trees all benefit from a more vigorous approach, according to Linda Chalker-Scott, Ph.D., Extension Horticulturist and Associate Professor at Washington State University and one of the ‘Garden Professors’ that I admire for their scientifically-based knowledge of horticulture.

Garden Professors on Facebook or Garden Professors Website

When we purchase gallon-sized pots in the nursery, the plants are often pot-bound, the often suffered from circled root systems, which if not corrected become even more problematic once the shrub is in the ground. Eventually they become girdling roots, which will lead to the early death of otherwise healthy trees and shrubs, as you see below.

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(photo courtesy of Tim Hamilton)

Think of it this way – roots respond to respond to pruning in much the same way as the crown—it stimulates new growth. If you prune the roots when you transplant, especially those that are excessively long or misshapen, the plant will respond by generating new, flexible roots that help them establish in the landscape. The best way to do this is by root-washing the shrub – taking it out of the pot, putting it in a wheelbarrow or other container, and washing off all the media so that you can see what the root system looks like.

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Two Critical Things to Do

  1. Prune the roots in a root-bound shrub or tree to avoid future problems
  2. Remove the media (soil) that shrub or tree came in

The second suggestion relates to the soil that comes with your tree or shrub. I always thought you just put it right in the ground, but evidence suggests that (generally) the container media is a soil-less mix with a large proportion of organic matter and pumice. It is best to remove this media as part of your root inspection, and use it as topdressing after planting, followed by mulch.

If you put the media in with your new plant, the material will inhibit root development outside the planting hole. It will also lose water more rapidly than the surrounding native soil (because of its porous nature), resulting in increased water stress to your new transplant.

Watering is Essential

As with all transplanting, regular and deep watering is needed to keep the new shrubs or trees happy while they establish their new root systems. The fall is a great time to plant trees and shrubs so happy planting!

Want To See How It’s Done?

Doug Gifford of Michigan recently posted to the Garden Professors Facebook page about his root washing, root-pruning, and planting of shrubs. You can check out the link here. Credit to Doug for most of the photos on this blog post.

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A Special Note

If you plant a shrub or tree already in full leaf they will be more stressed than those that are dormant. Dormant planting is better as all resources go towards root establishment. You may see leaf damage or even death in the short run. But as long as the roots are kept cool and moist throughout the transplanting process, and as long as you keep the area mulched and watered, it should be fine in the long run.

Check out more detail on this issue in this blog post. It talks about the four things that result in landscape planting failures and how changes in the nursery industry have resulted in more problems with roots. Many of these issues also apply to balled and burlapped (B&B) trees – more information here.

This year, Dr. Chalker-Scott extended her experiment to perennials, as talked about in this blog entry  Three months later she revisited the site – here are the results.

For more information on other horticultural myths check out these pages. Even better? Spread the word to others 😊
Horticultural Myths – Dr. Linda Chalker-Scott
Garden Myths (Robert Pavlis’ site – he is based in Guelph, Ontario)

Planting to Encourage Proper Root Growth and Branching

By Sue Flinders-Adams, Master Gardener

Here are a few tips to ensure that the new shrub or tree you just brought home will thrive and grow to its full potential.

1. Before planting, soak the plant in the pot, in a pail of water for a few hours or even overnight to hydrate the roots.

2. Carefully remove plant from the pot. If it doesn’t come out easily gently press on the sides so that the roots will come away from the pot, and tap on the bottom.

3. There are usually roots circling the pot – gently coax these roots away from the root ball to encourage outward growth. If roots are left in the ‘circling’ position, they will continue to grow in this direction, circling the plant and even girdling the trunk of the tree in 10 or 15 years.flinders pic 1

4. The picture shows the roots that have been spread out in the very large hole. Partially cover the roots to hold them in place and water thoroughly with transplant fertilizer, according to the directions. Fill in the hole with the surrounding soil. Top dress with an inch or two of composted manure, and then 3 inches of mulch. Prune off any dead branches.flinders pic 2

5. Branches are often cramped and a little twisted from shipping. Gently pull them away to a better positon and secure with plant supports (pictured). In a couple of weeks you can take the supports away and the branches will continue to grow in that direction.

6. flinders pic 3Three weeks later, the Black Lace Elder is looking very happy. It is October which explains the lack of new growth.

Preparing Your Perennial Garden for (gasp!) Winter…

By Mary-Jane Pilgrim, Master Gardener

Winter is fast approaching, and it’s time to prepare your gardens for the long, cold months ahead. By spending a little time this fall preparing, you can insure a healthier start to next year’s  season. Here’s a checklist of fall activities to get them ready for winter before it gets too cold to comfortably work outside.

  1. In all areas, spring-flowering bulbs, such as tulips and daffodils, should be planted six weeks before you expect the ground to freeze.
  2. Dig and store tender summer bulbs, such as dahlias and canna lilies, after the first hard killing frost. Store them in wood shavings or crumpled/shredded newspaper in a cool, dry place.
  3. Stake and tie up any young trees or shrubs that may break under the weight of wet snow or ice. Use soft (but strong) ties around the bark of trees, as wire or twine can cut into the bark and cause serious damage. Place wooden tepees over shrubs growing under eaves where snow tends to fall off the roof.
  4. After the first couple of frosts, hosta and daylily leaves will pull up very easily. Doing the removal in the fall means that you don’t have to deal with a slippery mess next spring.
  5. To prune or not to prune perennials to ground level? It’s a good idea to leave some plant material for visual interest through the winter months; ornamental grasses and hydrangeas have attractive seed heads and always look gorgeous in the winter, especially sprinkled with snow. With the exception of hosta and daylily leaves, I choose to leave everything else for spring cleanup.
  6. Protect hybrid roses with rose cones or bark mulch piled over the crown of the plant after a hard freeze.
  7. Remove all weeds from your perennial beds, and add compost to create a good base for next year’s growth. Compost applied in the fall is better than the spring as it has had time to break down and release its nutrients into the soil.
  8. Move containers to a protected location when frost threatens. After a frost, remove soil and plants from containers and store ceramic and clay pots in a garage or basement. Place used potting soil in the compost pile. If the containers have perennials planted in them, consider digging a hole to bury the plant including the pot, or bury in leaves in a protected area. Potted perennials will not usually survive the winter if not buried/covered.
  9. Instead of raking and bagging the leaves to cart off to the landfill, shred leaves with a mower to create amazing leaf mulch which can be spread on the garden as a winter protectant.  The earthworms will love the food, and the leaves will eventually break down, adding nutrients to the soil. If you decide to cover gardens with unmulched leaves, do not apply a thickness of more than about 10 centimetres (four inches). Any deeper will smother bulbs and perennials trying to grow in the spring.
  10. Take pictures of your gardens to assist with your dreaming and planning for the next season after the snow flies!
  11. As you wind down the garden season, make notes on what worked and what didn’t work, to help you plan for a successful garden next year. You are more likely to remember key points now rather than next April or May.
  12. Join a local garden or horticultural society. Many organizations meet over the winter on a monthly basis and provide interesting speakers who can help chase away the winter blues and provide you with great ideas for your upcoming garden season.

Weed Control

by Sharleen Pratt, Master Gardener in Training

Some of Mother Nature’s weedier creations can become a real nuisance in the garden because they rob other more desirable plants of nutrients, moisture and light. If they become established, they can be very difficult to control, therefore, it is highly recommended for the health of your plants, that you weed on a regular basis. The best time to weed is right after it rains as the weeds will be much easier to pull.

A weed is generally any plant that is not welcome in your garden! They are usually plants that can grow in any kind of soil, reproduce prolifically and interfere or compete with other more desirable plants. Many weeds have been introduced from another country and often become invasive. They can be very difficult to control and it is important that all gardeners try to prevent these particular plants from taking hold and spreading through their neighborhood.

Weed Identification can be intimidating! A few of the more common weeds, generally found in your lawn are:

BROADLEAF PLANTAIN, Plantago major (pictured above)

Broadleaf plantain is a perennial weed that spreads rapidly by seed and new shoots arising from the roots. Broadleaf plantain is distinguished by its rosette of dull green, oval leaves with thick green stalks, and its elongated spikes of tiny green flowers. Each flower is followed by a small egg-shaped pod with 5 to 15 tiny dark brown or nearly black seeds that are rather glossy. The flowers set seed from spring until late autumn. Broadleaf plantain is easily removed with a dandelion fork. It can be out-competed in a lawn by over-seeding and aeration.

COMMON CHICKWEED, Stellaria mediastellaria-media-846435_640

The common chickweed may be an annual, winter annual or perennial. They have small white flowers with 4 to 5 petals. They reproduce by seed and by horizontally spreading leafy stems that root at the nodes. Common chickweed will flower through the spring, summer and fall. One plant can produce 10,000 to 20,000 seeds. The seed remains viable for up to 10 years.  Hand-weeding is best when the seedlings are small. It can be reduced by over-seeding since chickweed doesn’t like a lot of competition.

PURSLANE, Portulaca oleraceaPurslane

Purslane is a summer annual, reproducing by seed. It has fleshy leaves and stem, which lie prostrate on the ground. The seeds in small capsules are black, kidney-shaped and extremely small. An average plant produces 60,000 seeds. Purslane is one of the most common weeds in gardens throughout Ontario. Though rarely producing roots from the stem, if even a small portion of the root of an uprooted plant touches the soil, it can grow a new root system and become established. It is easily pulled and dies at first frost.

CREEPING BUTTERCUP, Ranunculus repensbuttercup

Creeping buttercup is a perennial and reproduces by seed and runners. There are two common buttercups, one is a tall buttercup and the other is a creeping buttercup. The tall plant does not have runners and, therefore, reproduces by seed only. Both will flower in early spring to the end of July. Flowers are bright yellow, about 1 inch across. Each plant is capable of producing up to 250 seeds. The first leaves are kidney-shaped and somewhat hairy below. This weed is poisonous to grazing animals, and care should be taken to control it from spreading. Creeping buttercup survives best in moist location, so any improvement in drainage will help to control it. Persistent cultivation will also help, as well as constant mowing.

CREEPING CHARLIE or GROUND IVY, Glechoma hederaceaCreeping-Charlie

Creeping Charlie, also known as Creeping Jenny or Ground Ivy is a perennial which reproduces by creeping tangled rootstocks and also by seed. It is part of the mint family. The leaves are opposite and palmately veined. They have a bright green surface. The seeds are smooth and dark brown. The plant reproduces well through its surface runners. It has rapid growth in early spring and is a persistent plant whose leaves and stems stay green under the snow, allowing it to flower early. It flowers in spring around the same time as the dandelion. This plant spreads easily in a lawn, particularly in shady areas. Close mowing will help. If possible, be sure to dig out the small seedlings by hand in early spring. With large patches, heavy mulch or newspaper would help to kill an infestation.

FIELD BINDWEED, Convolvulus arvensisbindweed-2453936_640

Field bindweed is a perennial weed that spreads rapidly by seed and creeping roots. It is a hairless, twining, or trailing plant with deep, cord-like roots. There is an extensive spreading, underground root system. The creeping white rhizomes have been reported to grow up to 30m in length and 5m deep. Under favourable conditions, plants may flower within 6 weeks of germination and the twining nature of the plant can cause serious problems with crops. It is part of the morning-glory family. Seedlings can tolerate frost temperatures of minus 8C. Seeds can remain viable for up to 50 years. A severe infestation of bindweed is capable of producing over 800 kg of seed per acre.

An excellent website to help you identify weeds is: www.omafra.gov.on.ca/english/crops/facts/ontweeds/weedgal.htm