Tips & Tricks > Weeds

Weeds

In 2006, the province of Quebec banished ‘Killex’ an excellent product to control weeds. Killex is still available in some Canadian provinces and in the U.S.A. The only legal active ingredient left to control weeds is the Dicamba (one of the three ingredients of Killex). This product works well on several weeds such as dandelions and also some other broad leaf weeds. However, certain municipalities such as Longueuil including Brossard prohibit the application of this product.

The new products on the market are less effective and much more expensive. However with our treatments and your good practices, you should have a beautiful lawn. “The perfect lawn is a thing of the past since 2006”

EASY WEEDS TO CONTROL

Dandelion is an annual weed that reproduces by its many seeds. It is controlled if it is treated early.

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Violet is an annual weed that reproduces by its many seeds. It is controlled if it is treated early and repeatedly.

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DIFICULT WEEDS TO CONTROL

Ground Ivy is a highly invasive perennial weed if not control. We recognize it easily in June with its violet flowers.

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Crabgrass is one of the most aggressive weed in lawns. It is a wide-bladed grass that invades thin, bare or weak areas of lawns often near streets or parkings. It belongs to the grass family, so our weed control treatments have no effect on that plant and like all other weeds that looks like regular grass. Crabgrass is an annual and highly competitive plant that will die in the fall. In July, it is a light green color. In the fall, it becomes brownish-red and is generating seeds, awaiting warm spring temperature to grow.

The best protection against invasive crabgrass is to develop, support and maintain a dense and healthy lawn. We can treat your lawn with a pre-emergent herbicide in early spring to reduce the germination of crabgrass. This treatment will be effective if your lawn is dense. After that application you cannot do overseeding before fall. After a rainfall, you can also remove them manually before they produce their seeds. Other solutions are also possible for these unwanted weeds.

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Oxalis is an annual weed composed of 3 heart-shaped leaflets, reminiscent of 4-leaf clover. It makes a bright yellow flower. We can treat your lawn with a pre-emergent herbicide in early spring to reduce the germination of Oxalis. After a rainfall, you can also remove them manually before they produce their seeds.

Bent grass is a type of perennial grass of different color and texture than the Kentucky bluegrass. It is highly invasive and particularly competitive when lawns are irrigated often for short periods (irrigation systems programmed 20 minutes by area every two days or people who lightly water lawn surface) or the grass is cut too short. This grass grows late in the spring, so you can rake it out and apply seeds and garden soil in these areas. If you have large sections, you can also put sod. No treatment is available for this problem.

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The plantain is a perennial weed that grows in compact soils. Annual lawn aeration and good fertilization will reduce its growth. After a rainfall, you can also remove them manually before they produce their seeds.

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The wild strawberry is a perennial weed that is very difficult to control. It grows in an acid soil. The application of lime will reduce its progression. If this weed only grows in a limited area of the lawn, a non-selective herbicide may be applied. Subsequently, you will need to overseed because this type of herbicide kills all vegetation.

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FAQ

Why do I have weeds in my lawn?
Weeds grow where there is room on your lawn and more frequently when there are some bad maintenance methods (incorrect mowing height, compact ground, lack of irrigation, lack of seeding…). A lawn well fertilized, mowed at 2.5-3″, dense and regularly overseed with the good type of seed will have very few weeds.

Do you have ecological products to kill weeds?
Ecological is a word with a very broad definition. I would rather say that we have a product, tested and legal in Quebec, for registered lawn care specialists: Dicamba. It was one of the three active ingredients found in Killex that was banned in Quebec in 2006. It will control several broad leaf weeds including dandelion. Unfortunately, it will leave in place several undesirable: plantain, ground ivy… This product is however banned in Brossard. Fortunately, some promising products will be available. We will keep you informed of their availability and application.

Why my weeds are not all dead following your treatment?
Since 2006, only Dicamba, is legal to control weeds in residential lawns. It has an excellent control on the dandelion and several broad leaf weeds. However, it does not control several undesirable such as plantain, oxalis, crabgrass … and has a very limited control on ground ivy, clover,… This weed killer needs a few days to act and approximately 2 weeks before weeds disappear completely.