Cauliflower
Brassica oleracea var. botrytis
Cauliflower is widely considered the most challenging brassica to grow well. It demands consistent moisture, rich soil, and an uninterrupted growing period — any stress (drought, cold snaps, root disturbance) can cause the plant to produce tiny, premature 'button' heads or bolt to seed. Despite this, the satisfaction of growing a perfect white curd makes the effort worthwhile. Start seeds under cover and transplant carefully when seedlings are sturdy but not root-bound. Water consistently and feed with a nitrogen-rich fertiliser. As the curd develops, snap a few outer leaves over it to protect it from sun yellowing (called 'blanching'). 'Autumn Giant' and 'Snowball' are reliable UK varieties. Mini cauliflowers, spaced at just 15cm, produce tennis-ball-sized heads and are more forgiving for beginners.
Plan where to grow Cauliflower using our vegetable garden planner.
When to Sow Cauliflower
Sow cauliflower in February, March, April, May, August.
Time to Harvest Cauliflower
Expect to harvest approximately 3 months after sowing.
Companion Plants
Expected Yield
One head per plant, typically 400g–1kg. Mini cauliflowers produce 200–300g heads.
Common Problems with Cauliflower
Buttoning (tiny, premature curds)
Cauliflower produces small, button-sized curds when the plant is stressed — typically by drought, cold snaps, transplant shock, or root disturbance. Ensure consistent moisture throughout the growing season, transplant carefully without disturbing roots, and avoid checking growth by letting seedlings become root-bound in modules. Rich, fertile soil and steady conditions are essential.
Caterpillars
Cabbage white butterfly caterpillars can devastate cauliflower leaves, reducing the plant's ability to form a decent curd. Cover with fine mesh netting immediately after transplanting and keep it secure throughout the growing season. Hand-picking eggs (yellow clusters on leaf undersides) and caterpillars is effective on a small scale — check every few days from May onwards.
Discoloured curds
Cauliflower curds turn yellow or brownish when exposed to direct sunlight. As soon as the curd reaches 5cm across, snap a few of the large inner leaves over the top to shade it — a technique called 'blanching'. Check regularly and harvest promptly once the curd is tight and white, before the florets start to separate and the surface becomes grainy.
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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.