Astilbe in November: monthly care

Astilbe does not require pruning in the traditional sense—there are no woody stems to cut back for shape or vigour. What it does need is seasonal tidying to keep it looking good and to promote healthy growth. The main pruning windows are March and November, and your approach depends on your garden style and local conditions. In November, after the first frosts have blackened the foliage, you can cut back the spent flower stems and dying leaves to ground level. This tidies the border for winter and removes potential hiding places for slugs and snails. However, many gardeners prefer to leave the dried flower plumes standing through winter for structure and interest, especially when touched by frost. If you take this approach, delay the cut-back until March, just before new growth emerges. Use secateurs or garden shears to remove all old top growth down to the base, taking care not to damage the emerging shoots, which can appear surprisingly early in mild springs. Whether you prune in autumn or spring, always remove any damaged, diseased, or rotting foliage as soon as you spot it to prevent the spread of fungal problems. Astilbe does not need deadheading to prolong flowering, but if you dislike the look of fading blooms, snip off individual flower stems just above the foliage once they turn brown. The plant's energy goes into building strong roots and crowns rather than seed production, so leaving spent flowers does no harm.