Spring Lawn Care Guide 2026: Prepare Your London, ON Property

London, Ontario winters are hard on grass. By the time the snow melts and the ground thaws, most lawns are matted, compacted, and nutrient-depleted. The good news? A focused spring lawn care routine — done in the right order — can transform even a tired yard into thick, green turf by mid-May. This guide walks you through exactly what to do, when to do it, and when it makes more sense to call in professional lawn care services rather than go it alone.

Spring Lawn Cleanup: Why April Is Critical in Ontario

Most Ontario homeowners wait until the lawn "looks ready." That's usually too late. The window to act is early April — when soil temperatures climb above 10°C and cool-season grasses like Kentucky bluegrass and fescue start breaking dormancy. Miss this window and you're playing catch-up all season.

Your first task is a thorough spring yard cleanup: rake out dead matted grass (called winter kill), remove any debris that accumulated under snow, and clear your garden beds of dead foliage. This isn't just cosmetic. Matted debris blocks sunlight and traps moisture, creating perfect conditions for fungal diseases like snow mould to take hold.

If your property has a lot of ground to cover — or you're juggling a busy schedule — this is exactly the kind of job our spring cleanup service is built for. We handle the debris removal, bed prep, and first-cut all in one visit.

Dethatching & Aeration: The Secret to Thick Green Grass

Thatch is the layer of dead grass stems and roots that builds up between the soil surface and the living grass blades. A thin layer (under 1.5 cm) is actually beneficial — it acts as insulation. But when thatch exceeds 1.5 cm, it starts blocking water, air, and nutrients from reaching the root zone.

Dethatching uses a scarifying rake or power dethatcher to physically pull that layer out. It's aggressive but necessary every 2–3 years for most London lawns. Follow immediately with core aeration — a machine punches small plugs out of the soil, relieving compaction and opening channels for fertilizer and water to penetrate deeply.

Aeration is especially important for clay-heavy soils common in London's older neighbourhoods like Old North and Byron, where compaction builds up faster. The best time to aerate is early spring, right after your spring cleanup and before your first fertilizer application.

Lawn Fertilization & Weed Control (Without Killing Your Pets)

Once the lawn is cleaned up and aerated, it's ready to eat. A slow-release nitrogen fertilizer applied in early April gives your grass the fuel it needs to green up quickly and develop a dense root system before summer heat sets in. Look for a 30-0-4 or 24-0-8 formulation — high nitrogen, low phosphorus (Ontario's Cosmetic Pesticides Act restricts phosphorus applications on established lawns).

Weed control timing is critical. Pre-emergent herbicides need to go down before soil temperatures hit 10°C — before crabgrass seeds germinate. Miss that window and you're dealing with post-emergent spot treatments all summer. Post-emergent broadleaf weed control (targeting dandelions, clover, plantain) can be applied a few weeks after your first mow once weeds are actively growing.

Concerned about pets or kids? All products we use at Greenguard London are eco-friendly and pet-safe. We advise a 2–4 hour dry time before letting animals back on treated grass — after that, it's completely safe. See our full fertilization and weed control services for details on what we apply and when.

Professional vs. DIY: When to Call Greenguard London

Spring lawn care is genuinely DIY-able if you have the time, the right equipment, and a reasonably small property. A power dethatcher runs about $60/day to rent, a spreader for fertilizer is cheap, and a bag of pre-emergent costs around $40. Total DIY cost for a standard London lot: $120–$180 plus 4–6 hours of work.

Where professional lawn maintenance services pay for themselves:

• Properties over 5,000 sq ft — where equipment rental time and physical effort scale up fast
• Lawns with heavy thatch, severe compaction, or significant winter kill
• Homeowners who want a consistent weekly mowing schedule without managing it themselves
• Anyone who has tried DIY weed control and keeps losing ground to dandelions and crabgrass

Our seasonal lawn care packages start at $479 and include cleanup, mowing, fertilization, and weed control — everything handled on a schedule so you don't have to think about it.

Book Your Spring Package Before Slots Fill

Spring is our busiest season. We start booking out routes in March, and by late April most weekly mowing slots in neighbourhoods like Masonville, Wortley Village, and White Oaks are full. If you're considering a seasonal plan, the time to lock it in is now — not when your lawn is already six inches tall and the neighbours are judging.

Frequently Asked Questions