Professional Tips from Certified Arborists
Freezing temperatures, dry winds, and salt exposure quietly weaken trees long before spring. Proper winter plant health care builds resilience against these seasonal stressors by protecting roots, bark, and foliage before heavy snow arrives.
In this guide, you’ll learn how to prepare and protect your trees before freezing temperatures set in with plant health care programs. Our arborists also explain how dormancy helps trees survive the cold, how to prevent frost and salt damage, and when to call for professional help after a winter storm.
Continue reading for professional winter plant health care tips from our ISA certified Arborists, and contact Keystone Tree Experts to schedule a seasonal plant health care inspection.
5 Ways to Prepare Trees Before Snow
The best time to care for your trees is before the snow starts falling. Early preparation helps them handle winter’s cold, dry air and frozen soil. By taking a few key steps now, you can keep your trees healthy and reduce the risk of damage once temperatures drop.
- Watering Before the Ground Freezes: Trees that go into winter well-hydrated are much better equipped to handle the cold. Give them a deep soak in late fall while the soil is still soft. Moist soil holds heat longer and protects roots from freezing.
- Mulching to Protect Roots and Soil: Apply two to four inches of organic mulch around the base to insulate roots and stabilize soil temperature. Keep mulch a few inches from the trunk to prevent decay and deter rodents.
- Anti-Desiccant Sprays for Evergreens: Evergreens lose water through their foliage all winter. A late-fall application of anti-desiccant spray forms a light coating that helps needles retain moisture. Consider a second application if winter is long or dry.
- Structural Pruning and Inspection: Remove weak, crossing, or damaged branches before snow and ice accumulate. Proper pruning reduces canopy stress and improves structure. An arborist can identify vulnerable limbs that need attention.
- Soil and Root Care: Healthy soil supports strong roots. Loosen compacted areas to improve drainage and airflow. Add organic matter if needed to maintain balance and nutrient availability during dormancy.
Once your trees are ready for the cold, it helps to understand what happens next. Dormancy is a natural part of how trees conserve energy through winter.
Understanding Tree Dormancy and Recognizing Normal Winter Behavior
During the coldest months, trees enter dormancy, a natural process that slows growth, conserves water, and stores energy for spring. As daylight shortens and soil cools, trees rest while maintaining internal health.
Deciduous trees shed their leaves, while evergreens rely on waxy coatings to retain moisture. Roots stay partly active, drawing in water whenever the soil isn’t frozen.
Remember, a dormant tree remains healthy and alive. To recognize normal dormancy:
- Scratch a small section of bark. Green tissue beneath confirms vitality.
- Dormant buds are firm and positioned evenly along branches.
- Bark remains pliable and unbroken.
Preventing Frost and Salt Damage During Winter
Even with good preparation, winter can still bring challenges. Two of the most common threats are frost damage and salt exposure.
Frost injury happens when rapid temperature swings cause bark and internal tissues to expand and contract, sometimes leading to cracks along the trunk. Salt injury comes from de-icing materials that draw water away from roots and burn foliage.
You can reduce these risks by rinsing salt from nearby soil after storms, choosing salt-tolerant species such as honeylocust, juniper, and ginkgo, and using sand or calcium magnesium acetate instead of traditional rock salt. Late-winter inspections help detect early signs of stress so problems can be corrected before spring growth begins.
Recognizing Winter Injury and When to Act
Winter injury becomes visible gradually. Key indicators include:
- Browning or curling evergreen needles
- Cracked or peeling bark
- Dieback near branch tips
- Delayed leaf or bud emergence in spring
These symptoms suggest that cold, wind, or salt exposure disrupted the tree’s balance. Minor damage may heal naturally, but severe damage should be assessed by a certified arborist.
Deep Root Feeding: Timing Matters
Deep root fertilization strengthens trees by replenishing nutrients depleted during the growing season. Timing is the key to making this treatment effective. When soil is frozen, nutrient uptake is limited.
Late fall and early spring provide the best conditions for this treatment. Soil remains workable, and roots can absorb nutrients for future growth. Evergreen trees in sheltered areas may benefit from winter feeding if conditions remain mild.
At Keystone Tree Experts, our team develops fertilization plans based on soil analysis and species requirements to promote strong, consistent growth year-round.
Preparing for Winter Storms
Winter storms can still surprise even the healthiest trees. After heavy snow or ice, inspect your landscape from a safe distance and let ice melt naturally. Avoid shaking branches since frozen wood can snap easily.
If you see cracks, hanging limbs, or leaning trees, call a certified arborist as soon as possible. Prompt care can often prevent a small problem from becoming a major loss.
Keep Your Trees Strong All Winter with Experienced Plant Health Care
Winter is a critical season for long-term tree health. With more than 50 years of experience, Keystone Tree Experts provides science-based plant health care programs for local landscapes with ISA certified arborists focusing on strengthening trees before and during the cold season.
Contact Keystone Tree Experts today to schedule your winter plant health care evaluation and help your trees live long, healthy lives.
