How to prune helianthus 'lemon queen'

Pinch back in early summer; deadhead late summer through autumn; cut back in autumn or late winter. In early summer, cut or pinch the top third of stems to encourage branching. Remove spent flowers as they fade. In autumn or late winter, cut all stems to near ground level.

Pinch once in early summer; deadhead as needed; full cut-back annually. Helianthus 'Lemon Queen' is a tall, spreading perennial sunflower. Pinching or cutting stems back by a third in early summer delays flowering and reduces height. Deadhead to prolong the display. Cut all stems to the ground in autumn or late winter. Divide the spreading clump every 2–3 years to maintain vigour.

In early summer, cut or pinch the top third of stems to encourage branching. Remove spent flowers as they fade. In autumn or late winter, cut all stems to near ground level.