Pruning Tomato
When and how — Solanum lycopersicum
Prune your tomato in June, July and August — the optimal month is usually July.
The next pruning window is June.
When to prune?
The vegetable tomato is pruned in June, July and August.
With vegetables, 'pruning' is usually about directing energy and keeping production going.
Many vegetables don't need pruning in the classical sense, but several interventions directly affect the harvest. Tomatoes get sideshooted weekly: pinch out the shoots that form in the leaf axils so the plant puts energy into fruit, not extra foliage. Aubergine, sweet pepper and cucumber benefit from similar pinching. With brassicas and leafy crops (lettuce, chard, endive) you pick or cut outer leaves while the heart keeps growing — 'cut and come again'. Root crops (carrot, beetroot, parsnip) are left alone: keep the leaves intact until harvest, because they feed the root.
How to prune tomato
Tomato pruning depends entirely on the variety. Cordon (indeterminate) types grow as a single main stem and need regular attention from June through August. Bush (determinate) varieties require little to no pruning and should largely be left alone, as they fruit on side shoots. For cordon tomatoes, pinch out side shoots—the small growths that appear in the leaf axils between the main stem and branches—as soon as you spot them, ideally when they're 2–3 cm long. Do this weekly throughout summer using your fingers or clean secateurs. Removing side shoots channels the plant's energy into fruit production on the main stem and improves air circulation, reducing disease risk. If a side shoot gets away from you and grows large, cut it off cleanly at the base. In late July or early August, pinch out the growing tip of cordon plants once they've set four to six trusses (clusters) of fruit. This "stopping" ensures the plant focuses on ripening existing tomatoes rather than producing more that won't mature before autumn. In cooler summers or outdoor growing, stop after four trusses; in greenhouses, you can allow five or six. Remove any yellowing lower leaves as the season progresses to improve airflow and reduce fungal disease, but don't strip the plant bare—leaves are needed for photosynthesis. Use clean tools and avoid pruning in wet weather when blight spores spread easily.
Common mistakes
✗ Not sideshooting tomatoes
An un-sideshooted tomato puts 70% of its energy into extra leaves instead of fruit. That's half a bucket less per plant — five minutes of sideshooting a week pays off enormously.
✗ Cutting lettuce off whole
Take only the outer leaves and leave the heart standing; the plant keeps growing for another 4–6 weeks and you harvest far more per plant.
Combine with feeding
In June, July and August you can combine pruning with feeding — efficient, and you only disturb the plant once. Read the full care guide for tomato →
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).
