When Are Fruits and Vegetables Ready to Harvest?
Knowing when to harvest is one of those gardening skills that becomes easier with experience, but even experienced growers occasionally leave a crop too long or pick something before it has developed its best flavour.
Seed packets and growing guides provide an approximate number of days to maturity, but this should never be treated as a fixed harvest date. Temperature, rainfall, soil conditions, variety and the health of the plant all influence how quickly a crop develops.
The most reliable approach is to look at the crop itself. Size is useful, but colour, firmness, scent, texture and taste often tell us much more.
Harvest Dates Are Only a Guide
The time between sowing and harvesting can vary considerably from one season to another.
A warm spring may bring peas, salads and early roots forward. Cold weather can slow their development. During very hot summers, some crops mature more quickly, while others stop growing or become stressed.
The figures printed on seed packets can also be misleading because they do not always count from the same starting point. Some refer to the number of days from sowing, while others begin when a young plant is transplanted into its final position.
Use expected maturity dates as a reminder to start checking the crop rather than as an instruction to harvest it on a particular day.
Check Crops Frequently
Many vegetables have a relatively short period when they are at their best. Courgettes, cucumbers, beans and peas can change noticeably in only a few days.
During the busiest part of summer, it is worth walking through the growing area every day or two. Look beneath leaves and check the lower parts of plants, where produce is easily missed.
Regular checking also helps identify damaged or overripe crops before they begin to rot or attract pests. Removing these promptly keeps the plant productive and makes it easier to see what still needs harvesting.
When to Harvest Leafy Vegetables and Salads
Most leafy vegetables can be harvested whenever they have produced enough usable growth.
Cut-and-come-again salads are best picked while the leaves are young and tender. Remove the outer leaves and leave the centre of the plant intact so that it can continue growing.
Whole lettuces should feel firm but not hard. Harvest them before they begin stretching upwards to flower, particularly during warm weather. Once bolting begins, the leaves often become tougher and more bitter.
Spinach, chard and kale can also be harvested a few leaves at a time. Choose healthy outer leaves and allow the younger central growth to remain.
Leafy crops lose moisture quickly, so they are best harvested during the cool part of the morning and moved out of direct sunshine immediately.
When to Harvest Peas and Beans
Garden peas are usually ready when the pods look full but remain bright green and smooth. If the pods become pale, tough or heavily wrinkled, the peas inside may have passed their sweetest stage.
Mangetout should be picked while the pods are still flat and before the peas inside swell noticeably. Sugar snap peas are allowed to fill more fully, but the pods should remain crisp and tender.
French beans are generally best harvested before the seeds create large bulges along the pod. The beans should snap cleanly when bent. Runner beans can grow larger, but regular picking helps prevent them from becoming stringy and encourages the plants to continue flowering.
If you are saving peas or beans for seed, leave selected pods on healthy plants until they become fully mature and dry.
When to Harvest Courgettes, Cucumbers and Summer Squash
Courgettes are usually at their best when they are still relatively small, with smooth, glossy skins. They can be eaten when larger, but the flesh becomes less tender and the seeds more developed.
They grow remarkably quickly in warm weather. A courgette that seems too small one day may be ready shortly afterwards, so check productive plants frequently.
Cucumbers should be harvested when they have reached the expected size for the variety and while the skin is still firm and evenly coloured. Yellowing often indicates that the fruit has become overripe.
Avoid pulling these crops from the plant. Cutting the stem reduces the risk of damaging the fruit or tearing the productive vine.
When to Harvest Tomatoes
Colour is the most obvious sign of ripeness, but it must be judged according to the variety. Not every ripe tomato is red. Some mature to yellow, orange, pink, purple or remain partly green.
A ripe tomato should have developed its mature colour and should give slightly when pressed gently. It should also separate from the plant without excessive force.
Flavour is usually best when tomatoes are allowed to ripen on the plant. However, fruit may need to be picked earlier if heavy rain is likely to cause splitting, extreme heat threatens sunscald or pests are causing damage.
This season, rescuing tomatoes from damaged plants reminded me that the ideal harvest is not always possible. Sometimes it is better to pick sound fruit slightly early and allow it to finish ripening indoors than to risk losing it completely.
Tomatoes showing the first clear change from green towards their mature colour can normally continue ripening after they are picked.
When to Harvest Peppers and Aubergines
Sweet peppers can be harvested while green or left to develop their mature colour. Green peppers are fully usable, but allowing them to ripen usually produces a sweeter flavour.
The fruit should be firm, glossy and well developed. Cut peppers from the plant rather than pulling them, as the branches can be brittle.
Chillies may also be picked green or fully coloured, depending on the flavour and heat required.
Aubergines are ready when the fruit has reached a suitable size for the variety and the skin remains glossy. Press the skin gently with a finger. It should spring back rather than remaining deeply indented.
Once aubergines become dull, hard and heavily seeded, their eating quality begins to decline.
When to Harvest Root Vegetables
Root vegetables are difficult to judge because most of the crop remains beneath the soil. The top of the root often provides the best clue.
Gently move a little soil away from the crown of a carrot, beetroot, turnip or radish to check its width. If necessary, lift one plant as a test before harvesting the rest.
Radishes can quickly become woody or hollow, so check them regularly. Beetroot is usually most tender while the roots are moderate in size, although larger roots can still be useful for cooking and preserving.
Carrots can remain in the soil for some time if conditions are suitable. Young roots are tender and sweet, while mature carrots generally provide a larger harvest and may store better.
When we lifted the carrots from Bed 12, the total harvest reached 17 kilograms. That result was not determined by a date on the calendar. It came from checking the roots, judging their size and harvesting when the crop and our circumstances were ready.
Parsnips often become sweeter after exposure to cold weather. In regions with workable winter soil, they can sometimes be left in the ground and lifted as needed. In very wet soil or where the ground freezes deeply, earlier lifting and protected storage may be safer.
When to Harvest Onions and Garlic
Onions are approaching maturity when their leaves begin to yellow and fall naturally. Once most of the tops have gone over, the bulbs can usually be lifted and prepared for curing.
Do not deliberately bend healthy leaves to force maturity. The plant is still transferring energy into the bulb while the foliage remains green.
Garlic is normally harvested when several of the lower leaves have turned brown but some upper leaves remain green. If it is lifted too early, the bulbs may be small. If it remains in the soil for too long, the outer wrappers can split and the cloves may separate, reducing storage life.
Lift one bulb first and examine it before deciding whether the rest of the crop is ready.
When to Harvest Potatoes
Early potatoes can be checked once the plants begin flowering, although flowering is not a guaranteed sign that usable tubers are present. Carefully feel beneath the soil or lift one plant to assess the crop.
Maincrop potatoes intended for storage are normally left until the foliage has yellowed and died back. The tubers should then be allowed time for their skins to set before lifting, provided disease and weather conditions make this safe.
A mature potato has a skin that does not rub away easily when touched. Potatoes with very delicate skins are better used promptly rather than placed into long-term storage.
Keep harvested potatoes away from sunlight because exposure to light can cause greening.
When to Harvest Winter Squash and Pumpkins
Winter squash and pumpkins need to mature fully if they are to store well.
The fruit should have developed the mature colour expected for its variety. Its skin should be hard enough to resist gentle pressure from a fingernail, and the stem should be becoming dry and corky.
Harvest before the first damaging frost. Cut the stem cleanly and leave a short section attached to the fruit. Never carry a squash by its stem, because a broken stem creates an opening through which decay can enter.
A large fruit is not necessarily mature. Skin hardness, colour and stem condition are more reliable than size alone.
When to Harvest Apples, Pears and Other Tree Fruit
A ripe apple should usually separate when it is lifted gently and twisted. If it needs to be pulled forcefully, it may not yet be ready.
The seeds inside many mature apples turn dark brown, although this is only one indication and can vary between varieties.
Pears are often harvested while still firm and allowed to finish ripening away from the tree. If they are left until completely soft, the flesh may become overripe from the centre outwards.
Stone fruits such as plums, peaches and apricots should have developed their expected colour, aroma and a slight softness. Fruit intended for immediate eating can be allowed to ripen more fully than fruit that must be transported or stored briefly.
Different varieties on the same site may ripen several weeks apart, so check each tree individually.
When to Harvest Soft Fruit
Strawberries are ready when the whole fruit has developed its mature colour. Once picked, they do not continue ripening in the way that tomatoes do.
Raspberries should separate easily from the central core. If they resist, they are probably not fully ripe. Blackberries should be deeply coloured, plump and easy to remove.
Currants are generally harvested as complete strings once the berries have developed an even colour and flavour.
Soft fruit is delicate and deteriorates quickly. Harvest it into shallow containers, avoid crushing the lower layers and cool or use it as soon as possible.
Taste Is Often the Best Test
Appearance can tell us that a crop is close to maturity, but flavour reveals whether it is truly ready for the kitchen.
If you are uncertain, pick one example and taste it. This is particularly useful with peas, beans, carrots, sweetcorn, tomatoes and soft fruit.
Harvesting at the perfect moment is not an exact science. There will always be crops picked slightly early and others discovered later than intended. Regular observation teaches us what each variety looks and feels like at its best.
Keeping simple harvest records in Your Growing Companion can also help. Comparing dates, quantities and varieties from one season to the next gradually creates a harvest calendar based on your own garden rather than somebody else’s climate.
Continue Exploring Harvesting & Storage
For guidance on picking and handling produce safely, return to the main Harvesting & Storage guide and continue with How to Harvest Without Damaging Your Crops.
