Ontario cedar winter care
How to Protect Cedar Trees in Winter in Ontario
Winter care starts before the first hard freeze. Give your cedar hedge the right moisture, protect it from wind and road salt where needed, and know which spring symptoms deserve attention.
Published September 28, 2026 · For Toronto, the GTA and Ontario homeowners
The short answer
What do cedars need before an Ontario winter?
Check moisture in the root zone, water dry soil before freeze up, add mulch without covering the trunks, and protect the sides exposed to strong sun, wind or salt spray. Established cedars in a sheltered yard often need less intervention than a new hedge beside a road or driveway.
The common winter problem is moisture loss: foliage continues to lose water on sunny, windy days, but roots cannot replace it when the soil is frozen. This can show up as brown outer tips in late winter or spring. Salt, snow load and deer can add separate damage.
Installing a new hedge this autumn? See how late you can plant Emerald Cedars in Ontario before choosing a date.
Five steps to prepare your cedar hedge
Step 1
Check soil moisture before freeze up
Keep cedars evenly watered through the growing season. In late fall, if the soil is dry and still absorbs water, soak the root zone slowly before the ground freezes. Skip extra water when soil is already wet or drainage is poor.
Step 2
Mulch the root area
Spread about 5 to 8 cm of natural mulch over the root zone. Leave a clear gap around each trunk so bark is not buried. Mulch helps moderate soil temperature and conserve moisture.
Step 3
Screen exposed sides
For young or previously damaged cedars, stake a breathable burlap barrier on the sunny, windy or salt exposed side. Keep it away from foliage and leave the top open. A screen is especially useful beside a driveway or an open west facing yard.
Step 4
Plan where snow and salt will go
Keep salty plow snow and deicing runoff away from the hedge. Clear heavy, loose snow gently with an upward motion; let ice melt naturally rather than pulling frozen branches apart.
Step 5
Protect against browsing where needed
If deer visit your yard, install a suitable physical fence or mesh barrier before winter. Account for the extra height animals can reach when snow piles up, and keep netting from tangling in branches.
How much should you water before winter?
There is no useful single number for every cedar. Rainfall, tree size, soil and planting age all matter. Move mulch aside and check moisture a few centimetres below the surface, including inside the original root ball of a newly planted tree. Water slowly if the soil is becoming dry; stop if it remains wet.
Do not wait until the last day of fall to correct months of drought. Keep moisture consistent through the growing season and into late fall. Once soil is frozen, watering will not reach the roots. Our cedar watering guide explains how to adjust for weather and soil conditions.
Burlap, road salt and snow
Use a screen on the south, southwest or windward side if your hedge has suffered winter burn before. Beside a driveway or road, put the screen between cedar foliage and salt spray. Stake it firmly, leave space for air to move and keep the top open. A barrier will not fix salty water draining into the roots, so redirect runoff and avoid piling salted snow there.
Brush off heavy loose snow gently from below. Do not hit frozen branches or pull ice off them. Upright cedars can split under heavy loads; seek qualified help for large broken limbs or an unstable tree. Avoid late season trimming that encourages tender new growth. See our fall trimming decision guide for what can wait, and our Ontario cedar trimming calendar for the usual pruning window.
What to do when spring arrives
Remove winter barriers once the worst sun, wind and salt exposure has passed. Look for browning on the exposed face, broken branches, deer browsing and salty snow deposits. Wait until mid spring growth makes the living boundary clear before pruning damaged tips.
Brown foliage itself will not become green again. Living buds and branches may fill in over time. If one tree is brown throughout, the soil stays saturated or damage spreads, use our cedar browning diagnosis guide to investigate the cause before replacing it.
Ontario cedar winter care questions
Do cedar trees need to be covered in winter in Ontario?
Established cedars in a sheltered site may need no cover. A freestanding burlap screen can help young, newly planted or repeatedly damaged hedges exposed to winter sun, wind or road salt. Keep the screen off the foliage and leave the top open.
Should I water cedars during winter?
Water before the soil freezes if the root zone is dry and drains well. Frozen soil cannot absorb useful irrigation. During a winter thaw, check the soil first rather than watering by the calendar, and never add water to saturated ground.
Why did my cedar turn brown after winter?
Winter sun and wind can dry foliage while frozen roots cannot replace moisture. Salt spray can cause similar browning beside roads and driveways. Damage often becomes clear in late winter or spring; inspect the pattern and wait for new growth before pruning.
When should I remove burlap and prune winter damage?
Remove the barrier when the main risk of winter sun and salt spray has passed. Wait until mid spring growth shows which twigs survived before cutting confirmed dead tips back to living green growth. Brown foliage itself will not turn green again.
More cedar care guides
Winter protection works best alongside good care through the rest of the year. Continue with the guide that fits your hedge.
Sources and further reading
- Ontario: Eastern white cedar, including salt sensitivity and deer browsing.
- University of Minnesota Extension: Protecting trees and shrubs in winter, including evergreen moisture loss, burlap screens and spring pruning.
Conditions vary across Ontario. Use soil moisture and the exposure of your own yard to decide which measures your cedars need.
Planning a new cedar hedge?
NorthCedar supplies and plants Emerald Cedars across Toronto and the GTA. Tell us about your site and we can help you plan a hedge that fits its sun, drainage and winter exposure.
Ask about cedar planting