How to prune helenium autumnale 'pumilum magnificum'

Chelsea Chop late May; deadhead summer through autumn; full cut-back in autumn or early spring. Pinch or cut stems back by half in late May. Remove spent flower heads at the stem or back to a side bud through the season. Cut all stems to the base at season's end.

Chelsea Chop once a year; deadhead regularly; one hard cut-back annually. Helenium autumnale 'Pumilum Magnificum' responds well to the Chelsea Chop in late May, which delays flowering and prevents floppy stems. Deadhead faithfully to keep blooms coming into autumn. Cut the whole clump hard to the ground after flowering finishes or in early spring before new growth starts.

Pinch or cut stems back by half in late May. Remove spent flower heads at the stem or back to a side bud through the season. Cut all stems to the base at season's end.