How to prune liatris spicata

Deadhead after flowering (late summer); cut to ground in late autumn or early spring. Cut individual spent flower spikes down to the basal foliage once blooms have faded. If leaving for wildlife, cut all stems to the ground in late winter before new growth appears.

Deadhead as blooms fade; cut to ground once annually; divide every 3–4 years. Liatris spicata requires minimal pruning. Deadhead spent flower spikes at the base once blooms fade to keep the plant tidy and prevent excessive self-seeding, or leave them standing for birds to feed on the seeds over winter. Cut stems to the ground in late autumn or early spring. Division every 3–4 years maintains vigour.

Cut individual spent flower spikes down to the basal foliage once blooms have faded. If leaving for wildlife, cut all stems to the ground in late winter before new growth appears.