Pruning Plum Tree
When and how — Prunus domestica
Prune your plum Tree in June and July — the optimal month is usually July.
The next pruning window is June.
When to prune?
The fruit plum Tree is pruned in June and July.
Pruning fruit is about balancing growth and yield.
Fruit trees and bush fruits live in an eternal balance between leaf production (vigour) and fruit (yield). Prune too little and you get a dense plant with masses of small, disease-prone fruit. Prune too much and the plant reacts with watershoots and almost no fruit. The right line: once a year in winter dormancy (January–February) shape an open crown so light and air can reach every branch. With apple and pear, learn the difference between fruit spurs (short, 2–3-year-old wood — that's where the flowers come from) and wood buds (long whippy growth). Bush fruits need a different approach: redcurrant and gooseberry are pruned to an open goblet shape; blackcurrant needs renewal pruning where you remove one-third of the oldest stems at ground level each year.
How to prune plum Tree
Prune plum trees in June or July, during active growth when the risk of silver leaf disease—a serious fungal infection that enters through pruning wounds—is at its lowest. Never prune in winter. Use clean, sharp secateurs for small branches and a pruning saw for anything thicker than your thumb. In the first few years after planting, focus on building an open, balanced framework. Aim for a goblet or bush shape with three to five main branches radiating outwards, allowing light and air into the centre. Remove any shoots growing inward, crossing branches that rub, and any vigorous upright growth (water sprouts) that crowds the canopy. Cut back to just above an outward-facing bud to encourage an open habit. Once the tree is established, pruning becomes lighter. Remove dead, damaged, or diseased wood as soon as you spot it. Thin out congested areas to maintain good airflow, which helps prevent fungal problems. Plums fruit on short spurs on older wood and also on one-year-old shoots, so avoid heavy cutting back of productive branches. If the tree becomes too tall or wide, you can reduce the height or spread by cutting back to a suitable side branch, but do this gradually over two or three seasons rather than all at once. Always seal large cuts (over 3 cm diameter) with a pruning paint or wound sealant to reduce the risk of silver leaf spores entering. Burn or bin all prunings—don't compost diseased material.
Common mistakes
✗ Finally pruning after five years of neglect
A drastic prune after years of nothing triggers an explosion of watershoots and almost no fruit the next year. Better to gradually restore over 2–3 years than do everything in one winter.
✗ Pruning blackcurrant the way you prune redcurrant
Blackcurrant fruits on one-year-old wood, redcurrant on short, multi-year spurs. Prune a blackcurrant for shape (like redcurrant) and you'll harvest nothing.
✗ Pruning during frost
Wounds don't heal in frost and the wood can split. Wait for a frost-free day, even in winter dormancy.
Hold off on pruning
Better to wait than prune at the wrong moment. The next optimal window is June. Until then: leave the plant alone — only remove dead or diseased wood (which you can do year-round).
