Answer: Caryopteris clandonensis 'Dark night' is typically a trouble free aromatic shrub so I'm at a loss to explain why you're having difficulty with one of yours. It general grow 30" tall and wide, grows in full sun to part shade in average, well-draining soil. Bees love this bush and it also attracts butterflies. For best performance, cut back in late winter. In early spring, cut the previous year's growth back to young healthy buds and cut weak stems back to ground level. This renewal pruning will assure your Dark Night will have only healthy new stems all season long.
Best wishes with your garden!
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