UK pruning guide · RHS timing
When to prune toothed fly bush in the UK
Why the timing differs here
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.
How to prune toothed fly bush
Snip dead stems back to the base and trim leggy soft growth by up to one-third to a healthy node using clean, sharp blades. Avoid removing more than a third of the plant at once.
Roridula dentata is a slow-growing woody carnivorous shrub. It needs minimal pruning — remove dead or damaged stems in spring and lightly trim overly leggy growth to a node. Do not cut into old hard wood as regrowth is poor. Healthy stems with sticky leaves should be left intact.
More toothed fly bush care for British gardens
Care at a glance
Pruning toothed fly bush in the UK — FAQ
When should I prune toothed fly bush in the UK?
Prune toothed fly bush 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.
Is it illegal to prune toothed fly bush in spring or summer in the UK?
Pruning itself is not illegal, but destroying an active nest is. Under the Wildlife and Countryside Act 1981 it is a criminal offence to damage or destroy the nest of any wild bird while it is being built or in use, and the RHS treats the nesting season as March to August, sometimes longer. Check toothed fly bush for nests before cutting, and if you find an active one, leave that part of the plant until the birds have fledged.
How do you prune toothed fly bush?
Snip dead stems back to the base and trim leggy soft growth by up to one-third to a healthy node using clean, sharp blades. Avoid removing more than a third of the plant at once.
How often does toothed fly bush need pruning in a British garden?
Annually in spring, plus removal of dead wood as needed. Roridula dentata is a slow-growing woody carnivorous shrub. It needs minimal pruning — remove dead or damaged stems in spring and lightly trim overly leggy growth to a node. Do not cut into old hard wood as regrowth is poor. Healthy stems with sticky leaves should be left intact.
Why is UK pruning timing different from American advice?
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.