How to prune cosmos sulphureus 'klondike'

Pinch young plants at 15–20 cm tall; deadhead throughout the flowering season. Pinch the growing tip of young plants above a leaf pair to encourage branching. Once flowering, cut or snap spent blooms back to the next healthy leaf or lateral bud to redirect energy into new flowers.

Pinch once when young; deadhead every 1–2 weeks thereafter. Sulphur cosmos 'Klondike' self-seeds freely and flowers best with regular deadheading. Pinching young plants promotes bushiness. Once established, removing spent blooms every week or two sustains flowering well into autumn. It is a fast-growing annual — hard pruning is not needed, but light pinching early on pays dividends all season.

Pinch the growing tip of young plants above a leaf pair to encourage branching. Once flowering, cut or snap spent blooms back to the next healthy leaf or lateral bud to redirect energy into new flowers.