The Best Time of Year to Trim Arborvitae Trees. Arborvitaes (Platycladus orientalis, Thuja occidentalis) are coniferous shrubs and trees with yellowish green, needlelike foliage. The tree foliage is soft and feathery when young and grows more scalelike with age.
Arborvitaes are best pruned and trimmed during late spring, if at all.
Sep 21, Arborvitaes are best pruned and trimmed during late spring, if at all. Recommended Trimming Time. Conifers that have enough space to develop to their full mature form and are being allowed to develop freely do not require pruning, except to remove any damaged or dead branches.
Dec 15, Because arborvitaes grow continuously during the growing season, you can prune them at any time through mid-summer. Topping arborvitaes, however, negatively affects. Aug 12, Prune According to the Season. Morton Arboretum writes that although arborvitae may be lightly pruned at any time, the best times to prune arborvitae are early spring or in the middle of the.
Trim your overgrown arborvitae in the spring before new green growth appears, but after the last hard frost occurs in your region.