When to prune begonia 'merry christmas' in the UK

Prune begonia 'merry christmas' in early to mid spring. For shrubs that flower on the current season's growth, the RHS times pruning to early or mid spring — after severe weather has passed and once the growth buds begin to swell. In Britain that is usually March into April rather than the February common in warmer regions; prune too early and the new shoots meet a late frost.

There is no nesting-bird restriction that realistically applies to begonia 'merry christmas', since birds do not nest in it. The Wildlife and Countryside Act 1981 still protects any active nest you do find anywhere in the garden — the rule is about the nest, not the plant.

Cut flower stalks cleanly at the base with fine sterile scissors. Remove individual dead leaves at the petiole junction. Trim rhizome tips back to the pot rim when they overhang — no hard or structural pruning is needed.

As needed. Begonia rex 'Merry Christmas' is a classic foliage rex valued for its red-and-green patterned leaves and needs little pruning. Remove flower stems promptly to keep energy in the foliage. Trim away dead or damaged leaves as they arise, and shorten any rhizome tips that have crept past the pot edge to maintain a neat, compact clump.

Most pruning guides online are written for US conditions and anchored to USDA zones. Britain's maritime climate gives milder winters but later, less predictable last frosts — from March in the south-west to mid-May in the north — so the RHS advises against winter pruning for most plants: it pushes out soft growth that a late frost then kills. Britain also has the nesting-bird law, which has no US equivalent.