How to prune allium 'hair'

After flowering in early to mid summer, or leave to self-seed. Cut flower stems to ground level with scissors or secateurs if controlling spread. Otherwise leave plants to naturalise; the fine grassy foliage dies back on its own without intervention.

As needed to control self-seeding; otherwise rarely. Allium 'Hair' (a form of crow garlic with curling, hair-like filaments) needs little pruning. The whimsical flower heads can be left to dry and self-seed freely, which is often desirable for naturalistic plantings. Cut stems to the base after flowering if you want to control spread, and let the fine foliage die back on its own.

Cut flower stems to ground level with scissors or secateurs if controlling spread. Otherwise leave plants to naturalise; the fine grassy foliage dies back on its own without intervention.