How to prune antirrhinum majus 'sonnet pink'

As each flower spike fades; post-first-flush cutback in early to midsummer. Cut spent spikes back to the nearest healthy lateral shoot or leaf node. After the main flush is over, shear the plant back by one-third to one-half, then water and apply a balanced liquid feed.

Deadhead every 1–2 weeks; one rejuvenation cutback after the first main flush. 'Sonnet Pink' is a mid-height snapdragon that responds well to deadheading to extend its season. Remove spent flower spikes promptly to prevent seed set and encourage lateral shoots to bloom. A post-first-flush cutback to strong side shoots can produce a worthwhile second wave of flowers in late summer.

Cut spent spikes back to the nearest healthy lateral shoot or leaf node. After the main flush is over, shear the plant back by one-third to one-half, then water and apply a balanced liquid feed.