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I saw your report on trimming and shaping shrubs and wondered when was the best time. No, it is not too late to trim your boxwoods. I prune my boxwood hedge twice a year, once in the very early spring and again in late summer. Believe it or not, the hedge thrives from this kind of treatment. Boxwoods are a broad-leafed evergreen â just like hollies, azaleas and rhododendrons.
To thin, prune selected branches throughout the shrub to the main trunk, to a lateral branch or to a lateral bud. The older and diseased branches can be pruned to the ground. This method of pruning allows the center of the boxwood to receive light and air, improving the health of the shrub.