How to Prune ninebark [Midnight]?
Cut flowered growth back to strong young shoots below, removing up to a fifth of old stems near the base each year. Prune immediately after flowering.
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ninebark [Midnight] · Physocarpus opulifolius Midnight ('Jonight')
Grows best in acidic, moderately fertile, humus-rich soil. Will tolerate alkaline conditions, but chlorosis may occur on shallow chalk
Cut flowered growth back to strong young shoots below, removing up to a fifth of old stems near the base each year. Prune immediately after flowering.