How to prune dahlia 'ace summer sunset'

Pinch in late spring; deadhead through summer; cut back after first frost in autumn. Pinch the main stem tip above the third leaf pair to encourage lateral shoots. Remove spent flowers by cutting the stem back to the nearest healthy lateral bud or leaf.

Pinch once; deadhead weekly throughout summer. Dahlias need active pruning to perform well. Pinch out the central growing tip when the plant is 30–40 cm tall to force bushy branching. Deadhead spent blooms throughout the summer season to maintain continuous flowering. Cut the whole plant back to the ground after autumn frost blackens the foliage.

Pinch the main stem tip above the third leaf pair to encourage lateral shoots. Remove spent flowers by cutting the stem back to the nearest healthy lateral bud or leaf.