When to Harvest Swiss Chard
Quick answer:
Swiss chard is ready to pick as baby leaves about four to five weeks after sowing, and as full-size leaves after about seven or eight weeks. Pick the outer leaves first, cutting them cleanly at the base of the stalk, and leave the small leaves in the centre to keep growing. Picked this way, plants keep producing from summer through autumn, slow down in winter, and crop again in spring until they start to flower.
Swiss chard is one of the most generous crops you can grow. You don't harvest it once. Instead, you take a few leaves at a time for months on end, and the plant keeps replacing them.
When Swiss chard is ready
Baby leaves: about four to five weeks after sowing, when the leaves are around 5 cm long. These are tender enough to eat raw in salads.
Full-size leaves: about seven or eight weeks after sowing, once the plant has a good clump of leaves with thick, colourful stalks.
Chard sown from April to July is ready to pick through summer and autumn. Sowings made in midsummer stand through winter and give a fresh flush of leaves the following spring.
For sowing times, see when to plant Swiss chard in the UK
How to pick Swiss chard
Start with the outer leaves. They're the oldest and largest.
Cut or snap each stalk cleanly at its base, close to the ground, with a sharp knife.
Take a few leaves from each plant rather than stripping one bare.
Leave the small new leaves in the centre alone. This is where fresh growth comes from.
Picking regularly keeps the plant producing. Leaves left too long turn tough and are more likely to be eaten by slugs or damaged by leaf miner.
Cutting the whole plant
Instead of picking leaves one at a time, you can cut the whole plant about 5 cm above the base. It will regrow a fresh set of leaves within a few weeks. This works well for baby leaf chard sown close together, and for full-size plants that have grown tough or tatty.
Harvesting Swiss chard in winter
Swiss chard is hardy and survives most UK winters outdoors without protection. Growth slows right down in the cold, so pick more lightly and give plants time to recover. Covering plants with a cloche keeps the leaves in better condition and encourages a few more pickings through the coldest months.
Kale is another good crop to pick through winter. For more detail, see when to harvest kale
When the harvest ends
Chard plants eventually send up a tall flower stalk, usually in their second spring or during a hot, dry summer. Once flowering really gets going, the leaves become small and bitter and the plant stops being productive. Pull it up and sow a fresh batch.
Harvesting Swiss chard in containers
Pot-grown chard is picked in the same way: outer leaves first, with the centre left to grow. Plants in pots have less room and food, so pick a little more lightly and keep them watered between pickings.
For more detail, see growing Swiss chard in containers and how often to water Swiss chard
Storing Swiss chard
Chard is at its best eaten on the day it's picked, which is easy when you take a few leaves at a time. Picked leaves keep in a bag in the fridge for up to about a week. For longer storage, blanch the leaves and freeze them. The stalks and leaves cook at different speeds, so many cooks separate them and add the leaves at the end.
If your plants are slow to produce leaves, see why Swiss chard doesn't grow
For the whole growing season, see how to grow Swiss chard in the UK
Common questions
How do you harvest Swiss chard so it keeps growing?
Pick the outer leaves first, cutting them cleanly at the base of the stalk, and leave the small leaves in the centre. New leaves keep growing from the middle of the plant for months.
How long after sowing can you harvest Swiss chard?
Baby leaves are ready in about four to five weeks. Full-size leaves take about seven or eight weeks.
Does Swiss chard grow back after cutting?
Yes. If you cut the whole plant about 5 cm above the base, it regrows a fresh set of leaves within a few weeks.
Can you harvest Swiss chard in winter?
Yes. Swiss chard is hardy and survives most UK winters outside. Growth slows in the cold, so pick lightly, and a cloche helps keep the leaves in good condition.
Harvest times and picking method based on RHS guidance.