How to prune veronica longifolia 'blauriesin'

Deadhead through summer; main cut-back in early spring. Remove spent flower spikes at the base of each stem during summer to stimulate further flushes. In early spring, cut all old stems to 5–8 cm above the crown before new shoots emerge. Divide congested clumps every 3–4 years in spring to maintain vigour.

Deadhead as needed through summer; annually in early spring. Veronica longifolia 'Blauriesin' is a clump-forming perennial that benefits from deadheading spent spikes to encourage repeat blooms and a full cut-back in early spring. Leaving stems through winter provides some structure, but the main pruning task is a clean spring cut-back to make way for fresh growth.

Remove spent flower spikes at the base of each stem during summer to stimulate further flushes. In early spring, cut all old stems to 5–8 cm above the crown before new shoots emerge. Divide congested clumps every 3–4 years in spring to maintain vigour.