Rosemary is the most patient herb in the garden. It is a woody, slow-growing perennial that you harvest a sprig at a time, all year round in mild climates, and it asks for very little in return — sun, sharp drainage and restraint with the secateurs. The flavour is strongest in the young, soft tips, and the key rule is never to cut into the old, leafless wood, because rosemary rarely regrows from it.
Rosemary takes 90–120 days to mature, according to the Garden Grove crop data. It is a tender herb in the Lamiaceae family with low water needs. For the full growing picture, see our growing guide for rosemary, and use the Harvest Date Calculator to work out your picking window from your sowing date. Browse the full guides hub and the tools hub for more harvest timing advice, and check your local extension service for dates suited to your climate.
Rosemary at a glance
| Growing factor | What rosemary needs |
|---|---|
| Days to maturity | 90–120 |
| Category | herb |
| Family | Lamiaceae |
| Cold tolerance | tender |
| Water needs | low |
Signs rosemary is ready to pick
Rosemary is ready to pick once the plant is well established — usually in its second year — and has plenty of green, leafy stems. Look for young, soft-tipped sprigs with bright green needles that release a strong piney scent when you rub them. The best sprigs are the new growth at the tips of branches, which is tender and full of aromatic oils.
Avoid cutting stems that are thick, brown and woody with no leaves, because those will not regrow. Also avoid harvesting heavily from a young plant that is still establishing its roots — take only a few sprigs at a time in the first year. In spring, the plant produces a flush of soft new growth that is ideal for picking; in late summer the growth hardens off, and the flavour becomes more concentrated and resinous.
How to pick rosemary
Snip rosemary sprigs with sharp secateurs or scissors, cutting just above a leaf node on green, leafy growth. Take sprigs about four to six inches long, choosing the soft new tips rather than the thick woody stems. Never cut into old wood — the brown, leafless lower stems — because rosemary seldom sprouts from old wood and a hard cut there can kill the branch.
Take only a few sprigs at a time from any one plant, and never remove more than about a third of the plant's green growth in a single harvest. Harvest in the morning after the dew has dried, when the aromatic oils are at their strongest. If you need a lot of rosemary for a recipe, take a sprig from several branches rather than stripping one branch bare. For the full growing picture, see our growing guide for rosemary.
The best time of day to harvest
Harvest rosemary in the morning, after the dew has dried but before the sun gets hot. That is when the leaves are dry, crisp and most aromatic, because the essential oils are at their most concentrated after a cool night. Leaves picked in the afternoon heat are often limp and less flavourful, and wet leaves picked while the dew is still on them dry slowly and can go mouldy in storage.
Choose a dry day for harvesting if you can, and avoid picking after rain, when the foliage is wet and heavy. If you must pick on a damp day, spread the cuttings out in a single layer in a ventilated spot for an hour before you bundle or bag them. And get the harvest out of the sun straight away — a basket of cut herbs left in the sun for an hour will wilt and lose much of its aroma. Morning picking is a small habit that makes a real difference to flavour and keeping quality.
How often to pick
Rosemary is a pick-little-and-often crop, and regular picking is part of good plant care, not just a way to get a harvest. Once the plant is established, you can take a small picking every week or two through the growing season, always leaving enough growth for the plant to recover. Each cut encourages the plant to branch and push out fresh, tender growth, so a plant that is picked regularly stays bushy and productive far longer than one that is left alone.
Do not wait for a single big harvest unless the plant is one you cut whole for drying — for most herbs, steady, small pickings give you better flavour and a healthier plant. Take a few sprigs from several plants rather than a large handful from one, and always leave at least two-thirds of the plant intact. If you go away for a few weeks, ask someone to pick the herbs, or cut the plant back before you leave so it regrows while you are gone.
What happens if rosemary is left too long
Rosemary does not really go over in the way annual herbs do, but it does become less useful if it is left unpruned and unpicked for years. The plant grows tall and woody, the lower stems lose their leaves, and the only green growth is at the very tips of long, bare branches. The flavour of the remaining needles is still good, but the plant produces less and less usable growth.
If your rosemary has become a woody skeleton, do not cut it back hard into the old wood — it will probably not regrow. Instead, take cuttings from the green tips in spring and grow new plants, and harvest the remaining green growth from the old plant while the new ones establish. A rosemary plant that is picked little and often, and lightly pruned each spring, stays compact and leafy for many years.
How to store rosemary
Rosemary is one of the easiest herbs to store because its leaves are tough and resinous. Fresh sprigs keep for two to three weeks in the fridge, wrapped loosely in a damp tea towel inside a bag, or stood in a jar of water. For longer keeping, drying is excellent — rosemary keeps almost all its flavour when dried.
To dry rosemary, tie small bunches and hang them upside down in a warm, dark, ventilated spot for one to two weeks, until the needles are brittle. Strip the needles into a jar and store it in a dark cupboard. Use the Herb Drying Calculator for timing. You can also freeze sprigs whole in bags, or strip the needles and freeze them in oil in ice-cube trays for roasting.
Succession and continuous harvest tips
Rosemary is a perennial, so there is no succession sowing to plan — one well-placed plant can last for many years and supply a household indefinitely. The plant grows slowly, especially in its first year, so be patient and resist heavy harvesting until it is well established. In cold climates, grow rosemary in a pot you can move to a sheltered spot or indoors for winter, because it is tender and damaged by hard frost.
Prune lightly in spring after flowering, removing dead or crossing stems and shaping the plant, but never cut into old wood. A light annual prune keeps the plant bushy and productive, and the prunings themselves are a harvest — dry them or use them fresh. If a plant becomes woody and bare at the base, it is time to start a new plant from a cutting rather than trying to revive the old one.
If you are also growing other herbs and vegetables, our guides to harvesting thyme and harvesting chamomile follow the same picking principles, and check your local extension service for advice suited to your area.
Frequently asked questions
When can I start harvesting rosemary?
Once the plant is established, usually in its second year. Take only a few sprigs in the first year so the roots can establish.
How do I cut rosemary without harming the plant?
Snip green, leafy sprigs just above a leaf node. Never cut into old, brown, leafless wood — it rarely regrows.
Can I harvest rosemary in winter?
Yes, in mild climates you can pick it year-round. In cold areas, grow it in a pot and shelter it from hard frost.
Is dried rosemary as good as fresh?
Almost — rosemary keeps its flavour very well when dried, better than most herbs. Strip the dried needles into a jar and store in the dark.
Why is my rosemary plant woody and bare?
It has been left unpruned for years. Take cuttings from the green tips to start new plants, and prune lightly each spring to keep plants bushy.