How to Prune loosestrife 'Alexander'?
Remove faded flower stems to tidy

loosestrife 'Alexander' · Lysimachia punctata 'Alexander'
Best grown in moisture retentive well-drained soil that does not dry out in summer, in full sun or part shade. Excessive vigour in moist soils can make it a determined spreader, so has the potential to become a nuisance if not managed well
Remove faded flower stems to tidy