How to prune sensation mixed cosmos

Pinch when seedlings reach 30–40 cm; deadhead throughout summer and autumn. Pinch out the central growing tip above a leaf pair when plants are 30–40 cm tall to encourage side branching. Cut spent blooms back to the next side shoot or leaf to prompt continuous flowering. Leave a few late seed heads to self-sow if desired.

Pinch once in early growth; deadhead every 1–2 weeks through the season. Sensation Mixed cosmos (Cosmos bipinnatus 'Sensation Mixed') is a fast-growing annual that blooms prolifically with regular deadheading. Pinching out the growing tip when plants are 30–40 cm tall produces a bushier plant with more flowering stems. Deadheading prevents self-seeding and keeps blooms coming until frost. No hard structural pruning is needed.

Pinch out the central growing tip above a leaf pair when plants are 30–40 cm tall to encourage side branching. Cut spent blooms back to the next side shoot or leaf to prompt continuous flowering. Leave a few late seed heads to self-sow if desired.