Q: What is proper time to prune nandinas with red berries?
A: You can prune common nandina in the winter after you harvest any red berries you need for holiday decorations. On each shrub, count the number of canes and divide the number by three. Prune one third of the stems down to twelve inches high, one third at twenty-four inches high, and one third at thirty-six inches high. This will produce an attractive shrub with foliage from top to bottom. Of course, this won’t work for dwarf nandina. For these miniature shrubs, prune the tallest three stems down to four inches tall.