Dec 10, Late fall -- about December -- is another excellent time to think about trimming emerald green arborvitae or other kinds of arborvitae. Trim in late fall, when there is little or no chance of a. Aug 16, Many gardeners prune their arborvitae hedges twice a year, usually most heavily in early summer, clearing up any winter damage and cutting into the green growth (never cut into the brown, woody part of arborvitae: there are no dormant buds on old wood and that will leave an ugly gap that may never close!) to shape the hedge correctly.
Oct 08, Arborvitae are easy to grow, but they are often trimmed incorrectly. Make sure to remove overgrowth in the spring and fine tune in the summer. Prune heavily before plants break dormancy, and never remove more than one-third of the plant's foliage.
Avoid cutting into old wood and constantly step back to observe your treeremove.buzz: Jeffrey Douglas. Knowing your goal determines when is the best time to prune.
Pruning Arborvitae to Maintain an Ornamental Look. Spring - Removing overgrowth is similar to helping the tree maintain its shape. You will want to prune in mid-summer while the plant has time to grow to shoots before winter. If you wait to prune these types of bushes during summer or winter, you will see lower amounts of spring bloom.
For bushes that bloom during the summer (i.e. butterfly bushes and hydrangeas) prune these bushes in winter while they are dormant or in early spring before new growth develops.