How to Prepare Your Yard for Winter in Montreal

Montreal winters are not subtle. Between the -30°C wind chills, the salt trucks, the snowplows, and the freeze-thaw cycles, your yard takes a beating every year. But a few hours of prep in the fall can save you thousands in spring repairs.

Here's what to do, roughly in order, from October through November.

1. Shut Down Your Irrigation System

This is non-negotiable. Water left in irrigation lines will freeze, expand, and crack pipes. This repair costs $500–$2,000 depending on the damage.

When: Before the first hard freeze, typically mid to late October in Montreal.

How:

• Shut off the water supply to the system
• Open drain valves at the lowest points
• Blow out remaining water with compressed air (30–50 PSI for residential systems)
• Insulate above-ground backflow preventers

If you have a professional irrigation system, book a winterization service. It takes 30 minutes and costs $75–$150. Cheap insurance.

2. Final Lawn Care

Your lawn goes dormant in winter, but how it enters dormancy affects how it comes back in spring.

Last mow: Cut to 2.5 inches (6 cm). This is slightly shorter than summer height. Too short exposes the crown to cold damage. Too long creates matting that breeds snow mold.

Leaf cleanup: This is crucial. Leaves left on the lawn block light and trap moisture, creating perfect conditions for fungal diseases. Rake or blow them off — or better yet, mulch them with a mower so they decompose and feed the soil.

Fertilize: A fall fertilizer application (high potassium, low nitrogen) helps grass develop stronger roots for winter. Apply in October before the ground freezes.

3. Protect Vulnerable Plants

Not everything in your garden is equally tough. Here's what needs attention:

Roses: Hill up soil around the base (8–10 inches) and cover with burlap or rose cones after the first hard frost. Don't cover too early — you want the plant to go dormant first.

Young trees: Wrap trunks with tree wrap or plastic guards to prevent frost cracking and rodent damage. Newly planted trees (first 2–3 winters) are especially vulnerable.

Perennials: Cut back dead foliage on most perennials, but leave ornamental grasses standing — they add winter interest and protect their own crowns. Apply 3–4 inches of mulch over root zones.

Evergreen shrubs: Anti-desiccant spray (like Wilt-Pruf) helps prevent winter burn on boxwood, rhododendrons, and other broadleaf evergreens. Apply in late November when temperatures are above 4°C.

Container plants: Move terracotta and ceramic pots indoors — they crack when water freezes inside them. Hardy plants in thick plastic or stone containers can stay out.

4. Hardscape Maintenance

Your pavers, stone walls, and walkways need attention too.

Interlock pavers:

• Re-sand joints with polymeric sand if they've eroded during the season
• Fix any settled or shifted pavers before winter locks them in place
• Seal if it's been 3+ years since last application

Retaining walls: Check for leaning, bulging, or cracked blocks. Freeze-thaw will make existing problems worse. Small fixes now prevent big collapses in spring.

Walkways and steps: Ensure proper drainage around all hardscaped areas. Standing water that freezes creates heaving and damage. Clear any debris from drainage channels.

5. Drainage Check

Fall is the time to make sure your drainage is working before the ground freezes.

• Run water through French drains and downspout extensions to verify flow
• Clear catch basins and grates of leaves and debris
• Check that your grading still directs water away from your foundation
• Make sure sump pumps are working and discharge lines are clear

Poor drainage + frozen ground = ice dams, foundation pressure, and landscape damage. This is the most overlooked winterization step.

6. Snow Storage Planning

Where does the snow go? If you have a snow removal service, make sure they know:

• Where to pile snow (not on plant beds or near your foundation)
• Which areas are hardscaped vs. planted (plows can damage surface edges)
• Where underground irrigation lines and heads are located

Mark irrigation heads and garden bed edges with tall stakes so they're visible above snow.

7. Outdoor Furniture and Features

• Store or cover furniture — UV-resistant covers are worth the investment
• Drain and store garden hoses
• Shut off and drain outdoor faucets
• Remove and store portable fire pit components
• Cover or store barbecue with a quality cover

The Fall Cleanup Checklist

Quick reference for Montreal homeowners:

• ☐ Irrigation winterized
• ☐ Last mow at 2.5 inches
• ☐ Leaves removed from lawn
• ☐ Fall fertilizer applied
• ☐ Vulnerable plants protected
• ☐ Tree trunks wrapped
• ☐ Paver joints re-sanded
• ☐ Drainage checked and cleared
• ☐ Snow stakes placed
• ☐ Outdoor furniture stored
• ☐ Hoses and faucets drained

Need Help With Fall Cleanup?

It's a lot of work, especially for larger properties. We offer comprehensive fall cleanup and winterization services across Montreal. Book your fall prep service before the rush — October appointments fill up fast.