How to prune japanese spirea 'anthony waterer'

Late winter to early spring before bud break; deadhead after each bloom flush. In late winter, cut all stems back by one-third (or hard to 6–12 inches on overgrown plants). Deadhead spent flower heads to encourage rebloom. Thinning out weak interior stems improves air circulation and flowering.

Annually in late winter; deadhead as needed through summer. Spiraea japonica 'Anthony Waterer' blooms on new wood, so it can be pruned in late winter or early spring before growth resumes. Cut the plant back hard — to as low as 6–12 inches — to rejuvenate a woody base, or cut by one-third for routine maintenance. Deadheading after the first flush of carmine-red flowers often triggers a second bloom.

In late winter, cut all stems back by one-third (or hard to 6–12 inches on overgrown plants). Deadhead spent flower heads to encourage rebloom. Thinning out weak interior stems improves air circulation and flowering.