Anytime, Renewal prune.

Jul 28, Spring is the ideal season for trimming boxwoods, though you can trim them any time of the year. Trimming in the early spring is the best way to get rid of dead branches before new growth has set in. If you have to avoid one time of year for your trimming sessions, it’s best to avoid late fall since this is the time that most new growth bushdig.bar: Ossiana Tepfenhart.

Yes, you can prune hard or trim boxwood shrubs to the desired height depending on the time of year. Major pruning should be done in the late winter to early spring. Touch up trimming can be done all spring and summer. Avoid pruning in early fall into early bushdig.barted Reading Time: 7 mins. Jan 25, Boxwoods can be pruned any time but late summer and early fall.

This is because pruning then will spur new growth that won't harden off in time for winter and be killed by the cold. Severe late summer pruning followed by a cold winter could even kill the entire bushdig.bar: Steve Bender. Cut back at the end of May, beginning of June.

This way you can use the second growth phase which usually occurs around end of June for a more dense growth of the hedge or boxwood tree. You may then cut back again till mid or end of July. Variant 2. Aug 19, The optimum time to trim boxwoods is in the spring when the winter overgrowth has died down and new growth is about to emerge. Trimming in the early spring gives you the best accessibility to all the discoloration and dead leaves.

It’s also when scarring is least prone to occur.