How to Prune Van Houtte's spiraea?
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.

Van Houtte's spiraea · Spiraea × vanhouttei
Also known as: bridal wreath
Grow in moist but well-drained soil in full sun or light shade
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.