Dec 10, Active growth begins in spring and continues until dormancy in fall. Like most evergreens, arborvitae should be trimmed while it is dormant. This is roughly from about Thanksgiving to St. Patrick. Aug 16, Gaétan Paquet, an ecological arborist with 30 years’ experience pruning arborvitae hedges, recommends late summer pruning, from August 15 th to 30 th.
By pruning at this time, at the tail end of the hedge’s growing season, the hedge will retain a dense, very conical shape through the winter that will prevent the snow from clinging to the twigs and prevent any. Prune these shrubs in late winter or early spring before growth begins. Do not prune deciduous shrubs in late summer. Pruning shrubs in August or early September may encourage a late flush of growth.
This new growth may not harden sufficiently before the arrival of cold weather and be susceptible to winter injury. Pruning Arborvitae to Shorten a Tall Hedge. Late spring after flowering - After the arborvitae has flowered and before mid summer is the best time to prune back a tall hedge row. The plant can maintain itself after flowering and maintain the height you are looking for.
Pruning less of the plant but more frequently is by far the best for the overall health of it. We recommend every other month, which comes out to be five times per year. This is the sweet spot for pruning and will help keep everything looking and performing its best.
Expert Shrub Pruning Services for Alexandria, Arlington, & Springfield, VA. Apr 25, Arborvitae are evergreens that do well with enough pruning to help them maintain their natural shape. If you want to help these natural beauties become their best selves, time your pruning well, doing the heaviest pruning in early spring. However, you should also prune any time of year when you come across dead, diseased, or damaged bushtrim.buzz: 38K.