Show winter pruning hurts fruit trees it is unsafe to prune peach apricot japanese plum or sweet cherry trees this time of year because cold weather severely injures these species professor sor F M coe of the utah state agricultural ri college advises the reason for this is not clearly understood but the principal theory is that trees pruned in the late fall and early winter do not have a new ceiling layer of resin under the surface of the he cut to prevent evaporation of moisture as they do in the spring most apple varieties pears plums and prunes sour cherries and concord grapes gooseberries goose berries and currants are sufficiently hardy to be pruned with safety any time during fall or winter winters 1 it is not considered advisable however to prune trees when the wood is frozen according to professor coe cod |