Weed Control in Richmond Hill

Weeds compete with your grass for sunlight, water, and nutrients — and left unchecked, they can overtake even a healthy lawn within a single growing season. Our targeted weed control programs eliminate dandelions, clover, crabgrass, creeping Charlie, plantain, and other broadleaf and grassy weeds without damaging your existing turf. At Mow.ca, we use a science-based integrated pest management (IPM) approach that combines cultural practices with selective treatment to create conditions where your grass naturally outcompetes weeds.

How It Works

The foundation of effective weed control is a healthy lawn. Dense turf shades the soil surface and prevents weed seeds from germinating. That is why our weed control programs always work in conjunction with proper mowing height (maintaining 2.5 to 3.5 inches), regular fertilization, and timely overseeding of bare or thin patches. These cultural practices alone can reduce weed pressure by 50 to 70 percent compared to neglected lawns.

For active weed infestations, we use a combination of pre-emergent and post-emergent treatments timed to weed germination cycles in your region. Pre-emergent treatments — applied in early spring before soil temperatures reach 12°C — create a barrier that prevents weed seeds (especially crabgrass) from establishing. Post-emergent treatments target actively growing weeds, delivering the active ingredient directly to broadleaf plants while leaving grass unharmed.

Why Choose This Service

In provinces with cosmetic pesticide bans — Ontario, Quebec, Nova Scotia, Prince Edward Island, and New Brunswick — we use provincially approved alternatives. Our primary post-emergent tool is Fiesta (iron chelate / FeHEDTA), an iron-based herbicide that causes oxidative stress in broadleaf weeds, turning them black and killing them within 48 to 72 hours. For pre-emergent control, we apply corn gluten meal at a rate of 20 pounds per 1,000 square feet in early spring, which inhibits root formation in germinating weed seeds while providing a slow-release nitrogen boost to existing turf.

In provinces without cosmetic pesticide bans — Alberta, Saskatchewan, Manitoba, and British Columbia (where no provincial ban exists, though some municipalities have local bylaws) — we have access to a broader range of selective herbicides including 2,4-D, MCPP, and dicamba combinations. These products are highly effective against broadleaf weeds and are applied in accordance with all PMRA regulations and label directions.

Pricing & Scheduling

Results from post-emergent treatments are typically visible within 7 to 14 days. Most weed control programs include two to three follow-up visits per season to address new weed emergence and spot-treat problem areas. Weed control pricing ranges from $60 to $140 per treatment for a standard residential lot, depending on weed density and property size.