Another deciduous group of trees to avoid pruning in the winter are ornamental trees.
Prune apple trees, including flowering crabapples, mountain ash, hawthorns and shrub cotoneasters in late winter (February-early April).
Spring or summer pruning increases chances for infection and spread of the bacterial disease fireblight. Autumn or early winter pruning is more likely to result in drying and die-back at pruning sites.
Sep 12, Return. The best way to prevent the spread of oak wilt is to not prune any oak tree during the growing season. For that reason, the Iowa Department of Natural Resources (DNR) suggests to not start any pruning until at least the first frost.
“The risk of transmitting oak wilt through a pruning wound this time of year is low” says Tivon Feeley, with the Iowa DNR’s forest health program. Pruning of trees that flower early in the spring is generally delayed until after blooming.
The best time to prune fruit trees is late February to early April. Fruit trees pruned in fall or early winter may be susceptible to winter injury.
Also, the walling-off or compartmentalization of wounds occurs most rapidly just prior to the onset of growth in spring.
Iowa State University, Extension and Outreach. Aug 20, For some reason, many people believe tree pruning in the fall is the perfect time of year, especially where four seasons are present. The bright leaves begin falling, and some large limbs look a little iffy.
But that assumption could damage your precious trees or even kill them even mature trees. “The fall is not the time to learn how to treemulch.clubted Reading Time: 6 mins. Aug 30, At this time of the year, the cut wound is created just before the season of active growth and the plant can start the repair process. Pruning trees is species dependent Some may recommend pruning in the fall because the likelihood of insects and disease affecting the tree over the winter months is extremely low.
Depending on the species of tree, fall pruning would be better than summer pruning. Oak trees.