Pruning Mint
When and how — Mentha spicata
Prune your mint in June and September — the optimal month is usually September.
The next pruning window is June.
When to prune?
The herb mint is pruned in June and September.
You prune herbs by harvesting them regularly.
With herbs, pruning is the same as harvesting. The more often you pick the tips, the fuller the plant — especially with basil, mint and oregano, weekly tip-pinching produces a far denser bush. Woody herbs (rosemary, sage, thyme, lavender) also get one proper annual prune: cut back by a third to half immediately after flowering, but NEVER into old, bare wood — they won't re-shoot from there. Annual herbs (basil, coriander, dill) need no winter prune; you harvest until the first frost. Hardy perennial herbs (parsley, chives, oregano) get a light cut-back in November and a full clearance in February before new growth.
How to prune mint
Mint benefits from regular pruning to encourage bushy, leafy growth and prevent it becoming leggy or flowering prematurely. The main pruning windows are June and September. In June, once plants are growing strongly, cut back stems by about half to promote a flush of fresh, tender leaves and delay flowering. This mid-season trim is especially worthwhile if you want a continuous harvest of young foliage for the kitchen. In September, after the main harvest period, cut all stems down to within 5 cm of ground level. This autumn cut-back tidies the plant, removes any tatty or diseased foliage, and encourages vigorous regrowth the following spring. Use clean, sharp secateurs or garden shears for the job. Throughout the growing season, pinch out flower buds as soon as they appear if you want to maximise leaf production. Flowering diverts the plant's energy away from foliage, and leaves can become slightly bitter once blooms develop. If you don't mind a reduction in leaf quality and want to enjoy the purple or pink summer flowers—which are excellent for pollinators—let a few stems bloom, but cut them back once flowering finishes. Mint requires no complex pruning techniques. It regrows reliably from the base, even after hard cutting. If clumps become congested or start to die out in the centre after a few years, lift and divide them in spring, replanting only the vigorous outer sections and discarding the woody core.
Common mistakes
✗ Cutting lavender into old wood
Lavender doesn't re-shoot from old, bare wood. Cut back 5–10 cm into young green growth every year — neglect it for a few seasons and you'll have to replace the plant.
✗ Picking basil leaf by leaf
Don't pull leaves off the stem — cut the entire top with 2–3 leaf pairs. The plant then sends out two new shoots and bushes up.
✗ Letting culinary herbs flower 'for the bees'
A noble goal, but flowering changes the leaf flavour (often bitterer). Compromise: let part of the plant flower and cut the rest back in time.
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).
