Apr 01, You can cut back into wood that is a year or 2 old, and the tree will likely grow it back. However, in older trees, it's less likely to grow back. Arborvitae really don't need much pruning in general, so you should mostly prune to keep the tree's natural shape%(40). If you want to get rid of your arborvitae, cut all the stems to the ground. Otherwise, you should prune branches back to about 1/2-inch above the larger stems from where they grow.
Dec 15, No new growth will occur once the upward growing branch tips have been cut, and no horticultural benefit exists for topping an arborvitae.
Dec 10, The Best Time to Trim Arborvitaes. Arborvitae (Thuja spp.) is an evergreen shrub with thick, green foliage and a loose, conical shape. Its fast rate. If you must prune the top of an arborvitae, it's best to lightly trim back the tips of the plants as they approach the maximum height desired.
For example, if you want the arborvitae to get no taller than 8 feet, begin to tip-trim the top of the shrub once it gets 6 feet tall.