The best time to trim or prune boxwoods is generally in the late winter to early spring, before the plant breaks dormancy and begins new growth. This timing helps remove any winter damage and prepares the plant for a strong spring flush. Typically, this period is around late February to mid-March depending on the region. Pruning at this time also reduces the risk of disease spread due to cooler temperatures.
Some gardeners also prune in late spring after the spring flush to achieve a more manicured look. However, pruning in late summer or early fall is not recommended because it stimulates tender new growth that may be damaged by frost or winter weather.
Traditionally, pruning on or around early June (Derby Day) has been practiced, but this may lead to a second growth spurt requiring more frequent pruning. A good approach is to prune once well in early spring or winter and focus on quality pruning to reduce the number of trims needed.
In summary:
- Best time: Late winter to early spring (before new growth)
- Optional: Late spring (after growth flush) for shaping
- Avoid: Late summer and early fall to prevent winter damage
- Prune dead or damaged wood anytime as needed
This schedule promotes plant health, reduces disease, and maintains neat growth for boxwoods.
