Harvesting blackcurrants at the right moment is the difference between a crop that tastes superb and one that is tough, sour or bland. Pick too early and you lose flavour; pick too late and you lose texture, and the plant slows down. This guide covers when to harvest blackcurrants — the signs that tell you when one is ready, how to pick it without damaging the plant, the best time of day to harvest, how often to check, what happens if fruit is left too long, and how to store the harvest, both for a few days and for months. The timing below uses the published range for this crop, 365–730 days to maturity, which varies by variety, climate and soil, so treat it as a guide and judge each plant by what you can see and feel.
Blackcurrants are a fruit in the Grossulariaceae family, with hardy cold tolerance and moderate water needs. They need full sun and can be started indoors or sown direct. Knowing those basics helps you judge harvest time, because a plant that has been watered evenly and grown in the right conditions ripens evenly, while a stressed plant ripens unevenly and often disappoints. Keep a simple note of when you planted and when you first picked — after one season you will have a record far more useful than any general guide. As with all the timings in this guide, these are broad published ranges, not exact dates for your garden, so check your local extension service for your area.
At a glance
| Detail | Guidance |
|---|---|
| Days to maturity | 365–730 days |
| Family | Grossulariaceae |
| Category | fruit |
| Cold tolerance | hardy |
| Water needs | moderate |
| Sun | full sun |
| Soil pH | 6.0–6.5 |
| Spacing | 48–60 inches |
| Sowing | both |
If you are still growing this crop, the growing guide for blackcurrants covers soil, spacing, water and care in full, and the Zone 13 page for blackcurrants covers timing in a frost-free climate. The harvest date calculator can help you work out roughly when a planting should be ready, and the vegetable yield estimator helps you plan how much to grow.
Signs that blackcurrants are ready to pick
The best harvest decisions are made with your eyes and hands, not with the calendar. Days to maturity is a useful starting point, but weather, variety and watering all shift it, so learn the signs for this crop and check plants regularly once the harvest window opens. For blackcurrants, the signs are:
- Fully black, right through the strig: A ripe blackcurrant is deep, even black, including the berries at the base of the strig where the sun rarely reaches. Any red or green berries on the strig mean the whole strig needs more time.
- Soft and full: Press a berry gently. A ripe blackcurrant feels soft and full, and the skin may split very slightly under pressure. Hard berries are unripe; berries that burst at a touch are overripe.
- Sweet-tart taste: Taste is the final test. Pick one berry and eat it. A ripe blackcurrant is richly sweet-tart, with the strong flavour the fruit is known for. An unripe berry is sharp and astringent.
- The whole strig comes away easily: Blackcurrants are picked by the strig, not berry by berry. When the strig is ripe, it comes away from the bush with a gentle pull or a snip, with the berries still attached. If the strig holds fast, leave it for another few days.
- The berries at the top ripen first: Berries at the tip of the strig ripen before those at the base, so check the lowest berries before you decide a strig is ready. A strig is only ready when the bottom berries are black too.
The single most useful habit is to check plants every day or two once the first fruit starts to ripen, and to pick a test fruit if you are unsure. One test tells you more than a week of guessing. Taste it, look at it, feel it — and then pick the rest of the row at the same stage. If the test fruit is not ready, leave the plant alone for a few days and test again. Over a season you will learn to read this crop at a glance, and harvesting will become quick and confident.
How to pick blackcurrants without damaging the plant
Snip whole strigs with clean secateurs or scissors, cutting the stem just above the strig, and lay them gently in a shallow basket — picking berry by berry is slow and crushes the fruit. Strip the berries from the strigs at home by running a fork gently down the strig, or by hand over a bowl. Pick in the cool of the morning, when the berries are firm, and pick in passes, taking the ripest strigs first and returning every few days, because strigs on one bush ripen over a week or more.
Whatever the crop, the rules are the same: use clean, sharp tools, support the plant while you pick, pick in the cool of the morning when the produce is crisp, and never yank or tear. A clean cut heals fast; a tear leaves an open wound that disease can enter, and a damaged plant produces less for the rest of the season. Keep your tools clean between plants, wash your hands before handling food, and put harvested produce in a clean basket or trug rather than on the soil, where it picks up dirt and pests.
Best time of day and how often to pick
Pick in the morning, after the dew has dried but before the heat of the day, when the produce is cool, crisp and full of water. Produce picked in the heat of the day wilts fast and does not keep as well. Check plants every day or two once fruit starts ripening, and pick each fruit as it ripens. Regular picking encourages the plant to set and ripen more fruit, and in a frost-free climate like Zone 13 a healthy plant can keep producing for months.
Regular picking is not just about getting the best flavour — it is also how you keep the plant producing. Most fruiting plants slow down or stop setting new fruit when mature fruit is left hanging, because the plant has done its job. Picking regularly tells the plant to keep flowering, and in a frost-free climate that can mean weeks of extra harvests from the same plants.
What happens if blackcurrants are left too long
Left too long, blackcurrants soften, split, and drop to the ground, where they rot and attract wasps and fruit flies. Overripe fruit left on the bush also draws birds, which then learn where your bushes are and return for the ripe berries too. Check the bushes every few days once berries start to colour, pick each strig as it ripens, and remove any soft or mouldy strigs at once so they do not spoil their neighbours.
The cost of leaving produce too long is not just one spoiled fruit. An over-mature fruit left on the plant can slow the whole plant down, attract pests that then move on to healthy fruit, and spread disease from rotting tissue. A daily or every-other-day check is the cheapest insurance in the garden: it takes a few minutes, and it catches problems while they are still small. If you do find over-mature fruit, remove it promptly — compost it if it is diseased, and use it in cooking if it is simply past its best.
How to store blackcurrants
Eat blackcurrants the day you pick them if you can. If you must keep them, spread them in a single layer in a shallow container in the fridge and use within a few days, eating the softest first. For a glut, freeze berries in a single layer on a tray and bag them once frozen — they keep well for cooking, smoothies and baking — or cook them into jam, jelly, sauce or cordial following a tested recipe from your local extension service.
A good rule for storage is to sort the harvest as you pick it: the best produce keeps longest, so store the firm, unblemished fruit and eat the damaged or softest pieces first. Check stored produce regularly and remove anything that softens or spoils, because one bad piece can spoil the rest. Label anything you freeze or preserve with the crop and the date, so you know what you have and when to use it.
Succession sowing and continuous harvest
Blackcurrants are perennial bushes, so succession means choosing varieties that ripen at different times rather than sowing again. Early, mid-season and late varieties planted together can stretch the harvest over several weeks. Because the published range for this crop is 365–730 days to maturity, a newly planted bush needs a season or two to settle in before it fruits heavily — be patient in the first year and let the plant build strong wood. Keep notes on which varieties ripened when, so you can add a variety that fills any gap in the season.
Succession is the answer to the two most common harvest problems: a glut followed by nothing, and a crop that finishes all at once. Plant a little, often, rather than a lot at once, and you will have a steady supply instead of a feast and a famine. Keep notes on what you planted and when, so you can repeat the timing that worked and adjust the timing that did not.
Common harvesting mistakes
- Picking a strig when only the top berries are black, so the bottom berries are sharp and unripe.
- Picking berry by berry in the garden, which is slow and crushes the fruit.
- Piling berries deep in a bucket, which crushes the bottom layer and starts mould.
- Leaving soft, mouldy strigs on the bush, where they spread mould to the ripe fruit.
Most harvesting mistakes come from the same place: guessing instead of looking, and leaving the garden alone for a week at the critical moment. A short daily check, a test fruit when you are unsure, and picking little and often will avoid nearly all of them.
Frequently asked questions
How do I know when a blackcurrant is ripe?
Look for a strig that is fully black right through to the lowest berries, soft and full, and that comes away easily. Taste one: a ripe blackcurrant is richly sweet-tart. Blackcurrants take 365–730 days to maturity, so use that range as a rough guide and judge each strig by colour and taste.
Should I pick blackcurrants berry by berry or by the strig?
By the strig. Snip whole strigs with secateurs and strip the berries at home with a fork or by hand over a bowl — it is faster and crushes far less fruit.
Will blackcurrants ripen after picking?
No, blackcurrants do not sweeten once picked, so only pick strigs that are fully black and taste sweet-tart. An underripe strig will stay sharp on the counter.
How do I keep birds off my blackcurrants?
Net the bushes once berries start to colour, pegging the netting down so birds cannot get underneath. Picking every few days also helps, because there is less ripe fruit sitting there to attract them.
Can I grow blackcurrants year-round in Zone 13?
Zone 13 is frost-free, so bushes grow for a long time, but blackcurrants need a cold period to fruit well, which makes them a difficult crop in warm winters. The Zone 13 page for blackcurrants covers timing in a frost-free climate, and your local extension service can advise on varieties suited to your area.
Related guides
For more harvesting help, browse the guides hub, plan your next sowing with the planting calendar, and try the harvest date calculator and the vegetable yield estimator. Related harvesting guides in this series include gooseberries, blackberries, grapes. If you are growing in a frost-free climate, the Zone 13 page for blackcurrants and the growing guide for blackcurrants are the best next reads. And as always, check your local extension service — local advice beats any general guide for your soil, your weather and your varieties.