Q: We have mature 5½-foot-tall boxwood that has never been pruned. How do you recommend we go about this? A: First, early spring is the best time to tackle this job -- right before new growth begins.

Boxwoods need regular trimming and pruning to let in light, prevent fungus, and keep shrubs healthy. Best times to trim are mid-spring and late summer—avoid pruning in fall or winter. Style options ...