Jun 29, Some grow naturally in a globe or mounding form while others grow in a conical or narrow columnar form that provides an interesting vertical accent in the landscape. No matter the variety, boxwood shrubs do not require pruning. They can be left alone to grow naturally. 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 stumptrimmers.buzzted Reading Time: 7 mins. Prune boxwood each year in spring; it is okay to touch up the plant's shape or straying branches throughout mid-summer.
Be sure not to prune and shape your boxwood in late summer or early fall. When you prune the plant, you encourage the cut branches to grow. They might not recover from the cut in time for winter. This shrub all often used in mass or as a hedge but their care can be the same if used as a specimen. Pruning should be done in early spring before leafing out. Shear or prune outer branch tips to shape and reduce size. Repeat pruning through summer as needed. For best results pruning should start when the plant is young and stayed with year to year.
Boxwoods, because of their dense foliage, often die out in the center from a lack of sunlight. About one-third of the bush should be thinned each year, since boxwoods keep their foliage for three years. Using a bypass pruner, reach inside the shrub down to about 6 inches and prune off a few of the inner stems.
Monitor other boxwood, pachysandra, and sweetbox in the landscape for development of boxwood blight symptoms. (Other plants in the boxwood plant family, Buxaceae, including Pachysandra spp. and Sarcococca spp., are also susceptible to the disease and should be monitored for boxwood blight.
Since they can harbor inoculum for new infections on.