Prune Nandinas Properly
Q: What is proper time to prune nandinas? How is it done?
A: You can prune common nandina (the tall one, usually has berries) any time but the best time to prune is December – March). Do it after you harvest any red berries you need for holiday decorations.
On each shrub, count the number of canes. 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 after a few months of growth.
Of course, this won’t work for dwarf nandina. For these miniature shrubs, prune the tallest three stems down to four inches tall.