How to Prune steeple bush?
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.

steeple bush · Spiraea douglasii
Easy to grow in most moist soils, tolerant of all but the most extreme conditions. A rampant shrub that in time can form a dense thicket
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.