Pruning Tarragon
When and how — Artemisia dracunculus
Prune your tarragon in March and October — the optimal month is usually October.
The next pruning window is October.
When to prune?
The herb tarragon is pruned in March and October.
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 tarragon
Tarragon benefits from pruning twice a year to maintain vigour and encourage fresh, aromatic growth. The main pruning session takes place in March, just as new growth begins to emerge in spring. Cut back all the previous year's stems to within 5–8 cm of ground level using clean, sharp secateurs. This hard pruning stimulates a flush of tender new shoots, which have the best flavour for culinary use. Don't be timid—tarragon responds well to being cut back hard and will quickly regenerate. In October, after the growing season has finished, tidy up the plant by removing any dead, damaged, or straggly stems. This autumn prune is lighter than the spring cut; simply trim back untidy growth and clear away any debris around the base to reduce the risk of fungal problems over winter. If your tarragon has flowered during summer (producing small, inconspicuous yellow blooms), pinch out the flower stems as they appear. Flowering diverts energy from leaf production and the foliage becomes less flavourful once the plant sets flower buds. Throughout the growing season, harvest tarragon regularly by snipping off sprigs from the top of the plant. This acts as a form of light pruning, encouraging bushier growth and preventing the stems from becoming too woody. Avoid taking more than one-third of the plant's foliage at any one time. Regular harvesting keeps your tarragon productive and compact, reaching a manageable height of 40–80 cm.
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 October. Until then: leave the plant alone — only remove dead or diseased wood (which you can do year-round).
