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Common Lawn and Garden Weeds

General Weed Control

Why Should You Identify Weeds?

  • They may be an indication of an underlying problem such as hard, compact soil.
  • To tackle the problem accurately and use the right control strategies, you must distinguish between the weed varieties. Are the weeds broadleaf, vining, grassy?
  • Knowing what types of weeds typically grow in your region can help prevent them.
  • Some plants are classified as both plant and weed of which periwinkle (vinca) and datura are examples. They can become invasive in some areas

Types of Weeds

Broadleaf Weeds

  • Aggressive plants that do not resemble grass and appear on the weaker areas in your garden.
  • Examples of broadleaf weeds include chickweed, dandelions, and plantain.

Summer Annual WeedsThey begin to germinate in early spring and grow throughout the warmer season.Carpetweed, mallow, and knotweed
Winter Annual WeedsThey germinate from late summer through fall.Chickweed, deadnettle, henbit, and speedwell
Biennial WeedsThey complete their life cycle over two different growing seasons.Bull thistle, hemlock, evening-primrose, and hogweed
Perennial Broadleaf WeedsThey reproduce by seeds and vegetative means and are persistent every year.Buttercup, dandelion, Indian strawberry, and white clover

Grassy Lawn Weeds

  • Tend to grow on lawns and are hard to tackle.
  • Nimblewill, wild fescue, bluegrass, and zoysiagrass are a few examples.

Grass-like Weeds

  • Look similar to grass but are not really grass.
  • Nutsedge, pampa grass, and Bermuda grass are a few examples.

Common Weeds Found in Toronto

  • Quackgrass – A creeping perennial that has deep roots and broad leaves. The best way to get rid of quackgrass is to smother it or use a herbicide.
  • Dandelion – They can grow in any soil type. The best way to tackle them is to uproot them completely.Dandelion Weeds
  • Purslane – An annual weed that grows in summer and has reddish stems with yellow flowers. It is best to remove it completely when it hasn’t developed strong roots.Purslane Weeds
  • Clover – This perennial plant is disputed as a weed. To prevent growth, feed your lawns regularly, do not allow any space for clover to take over, and let the grass grow taller so that it blocks sunlight.Clover Weeds
  • Ragweed – A soft-stemmed, upright growing weed that produces a large amount of pollen. Improving the soil by adding compost will prevent its growth. Also, broadleaf weed killers will get rid of it.Common Ragweed
  • Field Bindweed – Also called creeping jenny. Visible along streams, roadsides, and grasslands. The best way to tackle them is to remove them along with roots.Field Bindweed Ontario
  • Common Mallow – Usually found in lawns, gardens, turf, and cultivated fields. It is best to pull it off when there are less than four leaves on it, or you can use herbicides to control the growth.Common Mallow Weed
  • Black Medic – A low growing summer annual weed that has yellow flowers. Typically found next to the sidewalks or by the roadside. Improve the soil by adding compost and aerating to prevent its growth.Black Medic Weed
  • Prostrate Spurge – Also called spotted spurge, it is a summer annual with reddish stems that grow on newly established lawns and sun-baked areas. Use broadleaf herbicides to remove them.
  • Yellow Wood Sorrel – An annual summer weed that resembles clover. Dig it out from the soil or use herbicide that contains triclopyr to get rid of it.Yellow Wood Sorrel Weed
  • Common Chickweed – A winter broadleaf weed found in yards, vineyards, and gardens. The best way to kill it is to remove as much of the weed as possible by hand.Common Chickweed
  • Corn Speedwell – Typically infests gardens and lawns. Use herbicides labelled to control speedwells to get rid of them.Corn Speedwell Weed
  • Broadleaf Plantain – Can be found in parks, along roadsides, and cracks in sidewalks. They have shallow roots which can be removed by hand.Broadleaf Plantain Weed
  • Canada Thistle – Has spear-like leaves, and is difficult to kill. Make your garden less friendly towards it and continuously use herbicide to get rid of it.Canada Thistle Weed
  • Prostrate Knotweed – A short-lived perennial that usually grows in turfgrass. Use herbicides or organic solution to remove it.Prostrate Knotweed in Lawn
  • Creeping Charlie – A perennial creeper that thrives in shady, moist areas. Use herbicide or lawn-friendly weed killers to remove it.Creeping Charlie Lawn
  • Mouse-Ear Chickweed – Has small leaves and thrives in moist and compact soils. You can easily remove it by pulling it off or spraying broadleaf herbicide.Mouse-Ear Chickweed
  • Crabgrass – Thrives in hot and dry areas and grows low to the ground. Pull it off using a hand knife, spray herbicides to get rid of it or let the grass around grow taller to prevent light from reaching it.Crabgrass Weed
  • Red Pigweed – Commonly found in cultivated fields and can be removed by spraying multiple herbicides.Red Pigweed
  • Hairy Nightshade – Typically found in orchards, vineyards, pastures, and other agricultural lands. Use lawn-friendly weed killers to remove it.Hairy Nightshade
  • Lamb’s Quarter – Thrives in gardens, near rivers and streams. Remove it by hand or consistently mow your lawn to prevent it from growing.Lambs Quarter Weed
  • Green Foxtail – Thrives in waste, cultivated lands, gardens, and roadsides. Proper mowing and fertilizing is the key to prevent its growth. Use vinegar or herbicides to curb it.Green Foxtail Weed
  • Canada Fleabane – Seen in gardens, grain fields, roadsides, and pastures. Use garden-friendly herbicides to get rid of it.canada fleabane weed

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