Radish
Raphanus sativus
Radishes are the ultimate quick-win crop — some varieties are ready to eat just 4 weeks after sowing, making them brilliant for impatient gardeners and children. Their speed also makes them the perfect intercrop and catch crop, filling gaps between slower-growing vegetables. Sow them thinly in short rows every 2–3 weeks from March to September for a continuous supply. Don't let them sit in the ground too long once ready — they turn woody and pithy very quickly, especially in warm weather. 'French Breakfast' is the classic elongated variety with mild flavour; 'Cherry Belle' is round and peppery. For winter use, try mooli or 'Black Spanish Round', which are larger and store well. Radishes bolt quickly in hot, dry conditions — keep them watered and sow heat-tolerant varieties in summer. Radish leaves are edible and make a peppery addition to salads and pesto.
Plan where to grow Radish using our vegetable garden planner.
When to Sow Radish
Sow radish in March, April, May, June, July, August, September.
Time to Harvest Radish
Expect to harvest approximately 1 month after sowing.
Companion Plants
Expected Yield
Around 20–30 radishes per metre of row; ready in 4–6 weeks.
Growing Tips
One of the fastest growing vegetables
Common Problems with Radish
Woody or pithy roots
Radishes become woody, hollow, and unpleasantly hot when left in the ground too long after maturing — they deteriorate very quickly, especially in warm weather. Harvest as soon as they reach usable size (usually 3–4 weeks after sowing) and sow small batches regularly rather than one large row. Consistent watering also prevents the roots from becoming tough and fibrous.
Flea beetle
Tiny round holes peppered across the leaves, caused by small jumping beetles that are particularly active in hot, dry conditions. The damage is mostly cosmetic on mature plants but can kill seedlings. Cover rows with fine horticultural fleece immediately after sowing, and keep the soil consistently moist — flea beetles are far less active in damp conditions.
Bolting
Radishes bolt (produce a flower stalk instead of a plump root) when stressed by heat, drought, or being sown too thickly. In summer, sow in partial shade rather than full sun and keep soil consistently moist. Choose heat-tolerant varieties for midsummer sowing, or focus on cooler spring and autumn windows when bolting is far less likely.
Plan your radish in the allotment planner
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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.