When pruning frozen trees, the usual pruning rules can be neglected. All more or less healthy branches are left, so that the living leaves on them contribute to the growth of new layers of wood. Only when the crown has recovered its volume, all unnecessary branches are trimmed according to the rules.
Prune dead trees after the start of the growing season, when the strong shoots will be visible. This will help to avoid irreparable mistakes: suddenly the relatively healthy branches will be cut out, and doomed to desiccation frozen branches will be left.
Scheme of pruning frozen trees
In the first years after the trees are frozen, growth is stunted. The situation will improve when new layers of wood grow. But strength and flexibility of branches with frozen wood inside will remain weak. Therefore, even with a small load of fruits, breakage is possible. Gradually, new branches are formed from the spikes located near the base of these branches to replace such branches.
After the first pruning of severely damaged trees, you have to do a kind of formative pruning for several years. To do this, select successfully located branches and create new and growing branches on their basis, and the damaged, but left, branches are cut out as new shoots grow.
What to do if the tree is completely frozen out?
If young trees (2-5 years old) are frozen to the level of the snow cover, it is better to cut the above-ground part all the way to the healthy wood. From the shoots that appeared below the place of pruning, but above the place of grafting, choose the strongest and on its basis form a new crown. The growth of the remaining branches is delayed by strong shortening, and the next year they are cut out on the ring. Since the root system is strong, you can expect branch growth to be active.