Additionally, people should be at a safe distance to avoid injury.

walnut trees from late winter to early spring (February-April). In fact, I expect more trees have been pruned during this time frame than all other times of year combined. The theory is to prune before the growing season so the wound will cover faster. The British and Europeans believe that summer pruning of black walnut trees is the better time.

Jun 23, I have a very old & large English walnut tree that has not been pruned for many years. From the limited research I have done on it, I found that the best time to prune was summer (which seems odd because other trees you trim in the fall). You should also observe that the younger branches of walnut time of year to trim english walnut trees are hollow.

The danger here is that water runs into them after the cut, which could assist rot.

If you want to restrict the size of the tree, perhaps because you are limited on space, then pruning to remove the central leader and therefore encouraging side shoot production is the best way to do this.

Again, the correct time for pruning is crucial here. In my experience, the best time is in summer, at the end of July. When is the best time for walnut tree pruning? Walnut trees are prone to sap bleeding so it is imperative that any pruning is undertaken between mid-summer and early autumn.

Otherwise bugs will be attracted to the tree, which are likely to introduce diseases, putting the tree at risk. Never hard prune a walnut tree: it will not tolerate bushnotch.barted Reading Time: 5 mins. Jul 05, The selection of the right time to prune a walnut comes from the hand with which it is a deciduous tree, meaning that it loses its leaves during the winter. Because of this, the ideal time to cut branches is winter.