What should I do if mice gnawed an apple tree during winter? - briefly
Inspect and trim damaged bark, wrap the trunk with hardware cloth or tree wrap, apply a rodent‑repellent barrier, and set humane traps or bait stations to eliminate the mice.
What should I do if mice gnawed an apple tree during winter? - in detail
If you discover that rodents have chewed the bark or cambium of an apple tree during the dormant season, immediate action can prevent further damage and improve the tree’s chance of recovery.
First, assess the extent of injury. Look for exposed wood, shallow or deep gouges, and any signs of sap flow. Small wounds that expose only the outer bark may heal on their own, while deeper cuts that reach the cambium layer require intervention.
Next, protect the damaged area. Apply a tree wound dressing that contains a breathable, water‑repellent polymer. Spread the product evenly over the exposed surfaces, avoiding excessive thickness that could trap moisture. For larger wounds, wrap the section with a soft, breathable tree wrap or horticultural fleece, securing it with gentle ties that will not constrict growth.
After protection, address the rodent problem to stop further gnawing. Set up snap traps or live‑catch traps around the tree’s base, positioning them along established runways. Bait with high‑protein foods such as peanut butter or dried meat. Check traps daily and remove captured animals promptly. If traps are unsuitable, consider applying a rodent‑repellent granule or spray to the soil surrounding the tree, following label instructions.
Improve the tree’s environment to deter future attacks. Remove fallen fruit, nuts, and debris that attract rodents. Keep the area around the trunk clear of dense vegetation, mulch, or wood piles that provide shelter. If feasible, install a physical barrier: wrap a metal or plastic tree guard around the trunk, extending at least 12 inches above ground and overlapping the lower branches.
Finally, monitor the tree throughout the winter and into spring. Look for new signs of gnawing, check that protective coverings remain intact, and observe bud development as temperatures rise. If the tree shows signs of decline—wilting leaves, dieback, or extensive cambium loss—consult a certified arborist for possible pruning, cabling, or, in severe cases, removal and replacement.
By assessing damage, sealing wounds, eliminating the rodent source, modifying the surrounding habitat, and maintaining vigilant observation, you give the apple tree the best opportunity to survive the winter and resume healthy growth in the growing season.