Garlic
Allium sativum
Garlic is one of the easiest allotment crops to grow, needing minimal attention between planting and harvest. Autumn planting (October–November) is preferred in the UK, as garlic needs a period of cold to trigger bulb development — a process called vernalisation. Split a bulb into individual cloves and push each one into the soil, pointed end up, 5cm deep and 15cm apart. Choose varieties sold for planting rather than supermarket garlic, which may carry disease and isn't adapted to UK conditions. 'Solent Wight' is a reliable softneck variety that stores well; 'Lautrec Wight' is a hardneck type with a more complex flavour. Harvest in June–July when the lower leaves start to yellow but the upper ones are still green. Dry thoroughly before storing — softneck varieties can be plaited and hung. Don't water heavily once the bulbs are sizing up.
Plan where to grow Garlic using our vegetable garden planner.
When to Sow Garlic
Sow garlic in October, November, February, March.
Time to Harvest Garlic
Expect to harvest approximately 8 months after sowing.
Companion Plants
Expected Yield
Each clove produces one bulb; a bulb contains 8–12 cloves to replant.
Growing Tips
Plant cloves with pointed end up
Common Problems with Garlic
Rust
Orange pustules appear on the leaves, typically from late spring onwards, gradually weakening the foliage. Remove the most heavily affected leaves and destroy them (don't compost). In most cases, rust doesn't significantly affect the bulb beneath — the harvest is still perfectly usable. Improving air circulation between plants and avoiding overhead watering helps reduce severity.
White rot
A devastating soil-borne fungus that produces fluffy white mould at the base of the bulb, causing plants to yellow and die. There is no chemical cure and the spores persist in the soil for 15–20 years. If white rot appears, avoid planting any alliums (garlic, onions, leeks) in the affected area for at least 8 years and be meticulous about cleaning tools and boots to prevent spreading contaminated soil.
Small bulbs
Undersized garlic bulbs are usually caused by late planting (missing the cold period needed for proper bulb development), dry soil in spring when bulbs are actively growing, or lifting too early. Plant cloves in October–November for the best results, keep soil moist (but not waterlogged) through spring, and don't harvest until the lower leaves have yellowed but the upper ones are still green.
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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.