How to prune arendsii astilbe

Late autumn after first frost, or early spring before new growth emerges. Cut all stems and foliage to within a few centimetres of the ground using shears or secateurs. Leave seed heads standing through winter if desired for ornamental effect, then cut in early spring.

Annually (cut back once per year); divide clumps every 3–4 years. Arendsii astilbe benefits from deadheading to tidy the plant, though many gardeners leave the feathery seed heads for winter interest. Cut all stems back to ground level in late autumn or early spring. Division every 3–4 years is more important than pruning for keeping this clump-former vigorous.

Cut all stems and foliage to within a few centimetres of the ground using shears or secateurs. Leave seed heads standing through winter if desired for ornamental effect, then cut in early spring.