Swiss Chard
Beta vulgaris subsp. vulgaris
Swiss chard is one of the most ornamental vegetables you can grow, with wide, glossy leaves held on thick stems that come in white, red, yellow, orange, and pink — the variety 'Bright Lights' is a particularly spectacular rainbow mix. Beyond looks, it's also one of the most practical crops on the allotment: almost indestructible, tolerant of both heat and cold, productive over a very long season, and usable in the kitchen as both a spinach substitute (the leaves) and an asparagus alternative (the stems). Sow from March to August and harvest as cut-and-come-again, taking the outer leaves while the plant continues to grow from the centre. A spring sowing will usually keep producing right through winter if protected with a cloche during the worst weather. Unlike spinach, chard rarely bolts. It's closely related to beetroot and needs similar growing conditions.
Plan where to grow Swiss Chard using our vegetable garden planner.
When to Sow Swiss Chard
Sow swiss chard in March, April, May, June, July, August.
Time to Harvest Swiss Chard
Expect to harvest approximately 2 months after sowing.
Companion Plants
Expected Yield
Cut-and-come-again over many months; each plant provides 2–4kg of leaves.
Common Problems with Swiss Chard
Leaf miner
Pale, winding tunnels appear inside the leaves where fly larvae are feeding between the upper and lower leaf surfaces. While mostly cosmetic, heavy infestations reduce the plant's vigour. Remove and destroy affected leaves to break the lifecycle, and cover plants with fine horticultural fleece to prevent the adult flies from laying eggs on new growth.
Bolting
Chard is much less prone to bolting than spinach, but it can still bolt in hot, dry conditions, particularly if the plants are under stress. Water consistently during dry spells and avoid overcrowding. If a plant does bolt, cut the flower stalk right back to the base — the plant will usually continue producing new leaves from the crown.
Slugs
Young chard seedlings are particularly vulnerable to slug damage, especially in damp conditions. Protect transplants with copper tape rings, organic slug pellets, or cloches until they're well established. Once plants are larger and growing strongly, they can usually tolerate some slug nibbling on the outer leaves without significant impact on overall productivity.
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Cherry Tomato
Solanum lycopersicum var. cerasiforme
Cherry tomatoes are one of the most rewarding crops for UK allotment growers. These small, sweet fruits ripen reliably even in cooler summers, producing heavy trusses from July right through to October. They thrive in grow bags, pots, or directly in the ground, making them versatile for any plot size. Pinch out side shoots regularly on cordon varieties to channel energy into fruit production. Bush varieties like 'Tumbling Tom' need no training and work brilliantly in hanging baskets. Feed weekly with a high-potash tomato feed once the first fruits set. The key to great flavour is letting them ripen fully on the vine rather than picking early.
Beefsteak Tomato
Solanum lycopersicum
Beefsteak tomatoes produce the large, meaty fruits that are perfect for slicing into sandwiches and burgers. They need a long growing season in the UK, so starting seeds early under cover is essential. These are almost always grown as cordons — train them up a single stem, removing side shoots weekly. Each truss produces fewer but much larger fruits than cherry types, often weighing 200–500g each. They benefit from greenhouse growing in cooler regions, though sheltered outdoor spots in the south can produce good results. Consistent watering is critical; irregular watering causes blossom end rot and fruit splitting. Stop the plant at 4–5 trusses to ensure fruits ripen before autumn.
Nantes Carrot
Daucus carota
Nantes carrots are the gold standard for flavour — sweet, crisp, and cylindrical with a smooth skin that barely needs peeling. They perform well in most UK soils but prefer light, stone-free ground to grow straight. If your soil is heavy clay, grow them in raised beds or deep containers filled with sandy compost. Sow thinly to avoid the need for heavy thinning, which attracts carrot fly. Cover rows with fine mesh or enviromesh as a physical barrier against carrot fly — this is far more reliable than companion planting alone. Successional sowing from March to July gives you carrots from June through to winter. Late sowings can be left in the ground over winter under a thick mulch of straw.
Butterhead Lettuce
Lactuca sativa
Butterhead lettuce produces soft, rounded heads with tender, buttery-textured leaves that melt in the mouth. It's one of the quickest salad crops to grow — ready in as little as 8 weeks from sowing. Unlike iceberg types, butterheads tolerate partial shade and are less likely to bolt in warm spells. Sow small batches every 2–3 weeks from March to September for a continuous supply. They work well as an intercrop between slower-growing vegetables like brassicas and leeks. Water consistently but avoid wetting the leaves to reduce the risk of grey mould. 'All the Year Round' is the classic UK variety and lives up to its name, performing well in almost every season.