When to prune begonia 'santa cruz sunset' in the UK

Prune begonia 'santa cruz sunset' 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 'santa cruz sunset', 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.

Pinch growing tips when shoots are 3–4 inches long to promote branching. Remove spent flowers regularly. In autumn, cut all stems back to 2–3 inches above the tuber before lifting for winter storage.

Pinch once early season; deadhead regularly; full cutback once annually. This trailing Begonia boliviensis cultivar has a naturally graceful, cascading habit and needs minimal shaping. Deadhead spent blooms to extend the display season. Pinch stem tips early in the season to encourage branching and a fuller basket. Cut back hard before frost and store tubers dry.

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.