Herbarium

Asparagus is a long-lived perennial (15-20 years productive life) that requires a permanent, well-prepared bed and patience - crowns should not be harvested in the first two years to allow the plant to establish strong roots. The reward is an annual spring harvest of tender spears over 6-8 weeks, earlier and better-flavoured than anything commercially available. Prepare the bed deeply with plenty of organic matter and choose a sunny, sheltered site.

Aubergines are the most heat-demanding common vegetable for UK growers and almost always require greenhouse or polytunnel conditions to produce a reliable crop. Started early indoors and grown in containers or grow bags, they produce glossy, deep-purple fruit from midsummer. Consistent feeding, good light, and warm nights are essential for fruit to set and develop.

Basil is a tender annual herb requiring warmth to thrive. It is used extensively in Mediterranean cooking and makes an excellent companion plant for tomatoes.

Beans are frost-tender legumes that fix atmospheric nitrogen. Climbing types need support structures; dwarf types are self-supporting. Both produce pods ready to pick within weeks of flowering.

Beetroot is a versatile root vegetable where both the roots and young leaves are edible. It tolerates light frost and can be harvested over an extended period by leaving roots in the ground as needed. Bolt resistance is important for early sowings.

Broad beans are hardy legumes that fix atmospheric nitrogen and tolerate frost. Autumn-sown plants overwinter and crop earliest; spring sowings are quicker to establish. Both types produce long pods with large, meaty seeds eaten fresh, dried, or frozen.

Broccoli for UK gardens comes in two main forms: calabrese (a summer-cropping annual with a large central head) and purple sprouting broccoli (a winter-hardy biennial producing multiple small spears). Purple sprouting broccoli is particularly valued for filling the hungry gap in late winter and early spring when little else is ready. Both prefer fertile, well-firmed soil and a sunny, sheltered position.

Brussels sprouts are a slow-growing winter brassica that needs the longest season of any common vegetable - often 9 months from seed to harvest. They develop over summer and autumn, producing their characteristic tight sprouts after the first frosts, which improve the flavour. Firm soil, deep planting, and staking are important as the tall plants are top-heavy and vulnerable to wind rock.

Cabbage is a versatile brassica available in summer, autumn, and winter varieties, meaning a well-planned rotation can provide harvests almost year-round. Heads can be pointed, round, or savoy-type; spring and summer types are fast-maturing while winter cabbages are dense and frost-hardy. Firm, moist soil and consistent feeding produce the best solid heads.

The carrot is a biennial root vegetable grown as an annual in kitchen gardens. Cultivated forms are typically orange due to high beta-carotene content, though heirloom varieties range from white and yellow to red, purple, and black. In its first year it produces the edible taproot; in the second it bolts to flower and seed.

Cauliflower is one of the more demanding brassicas, requiring consistently moist, fertile soil and a long, uninterrupted growing season to form good curds. Any check to growth - drought, cold snap, or nutrient shortage - can cause small, loose, or discoloured heads. A well-grown cauliflower produces impressive, densely packed curds and a wide range of varieties covers summer through to spring harvest.

Celeriac is a slow-growing, celery-flavoured root vegetable prized for its knobbled, cream-fleshed bulb. It requires a very long growing season - started indoors in late winter and harvested in autumn and winter - and dislikes any check to growth from drought or cold. Demanding but rewarding, it produces a reliable, unusually flavoured root that stores well into winter.

Chard is a productive leafy crop related to beetroot. Both the stems and leaves are edible. It tolerates light frost and can produce through autumn and mild winters. Cut outer leaves repeatedly and the plant continues cropping for months.

Chives are a clump-forming perennial allium with mild, onion-flavoured leaves and edible purple flowers. They are among the easiest herbs to grow, tolerating most conditions and dying back in winter before re-emerging each spring. Dividing the clumps every few years keeps them vigorous and productive.

Courgettes are fast-growing, frost-tender summer squash that produce prolifically through warm months. A single plant can yield throughout the season when harvested regularly; fruits left to swell become marrows and reduce overall output.

Cucumbers are warm-season crops highly sensitive to frost. They produce best with consistent heat and moisture. Indoor and outdoor types differ in pollination requirements.

Garlic is a hardy bulb crop typically planted in autumn and harvested the following summer. The overwintering period provides cold exposure (vernalisation) that is important for good bulb development. Hardneck types offer stronger flavour and are better suited to cold climates; softneck types store longer.

Kale is a hardy brassica that improves in flavour after frost. It is one of the most cold-tolerant food crops, continuing to produce through winter in mild climates.

Leeks are hardy winter alliums that tolerate hard frost and stand in the ground until needed. They require a long season - sown indoors in late winter and transplanted in early summer into deep, fertile soil. Blanching the lower stem by earthing up produces longer, sweeter white shanks.

Lettuce is a fast-growing cool-season salad crop. It tolerates light frost but bolts quickly in heat. Cut-and-come-again types can provide continuous harvest over several weeks.

Mint is a vigorous perennial herb that spreads aggressively by underground runners and is best contained in a buried pot or raised bed section. It dies back to the ground in winter and re-emerges reliably each spring. Regular cutting encourages fresh, leafy growth and prevents the plant becoming straggly or flowering too early.

Onions are a kitchen staple grown from seed or sets (small bulbs). Sets are far easier for beginners - simply press them into firm soil in spring and lift a full crop in summer. A long-season crop, they need an open, sunny site and good drainage to develop hard, well-shaped bulbs for long storage.

Pak choi is a fast-growing Asian brassica with crisp, succulent stems and tender leaves harvested in 4-8 weeks. It is prone to bolting in warm weather, so spring and autumn sowings are most reliable. It can be harvested as whole heads or as baby leaf, and the mild, slightly mustard flavour suits stir-fries, soups, and salads.

Parsley is a biennial herb grown as an annual for its flat or curly leaves, widely used in European cooking. It has notoriously slow germination - often taking 4-6 weeks - but once established produces prolifically from a sunny or lightly shaded spot. Flat-leaved (French) parsley has better flavour; curly types are more ornamental and slightly hardier.

Parsnips are a long-season root vegetable with notoriously slow and erratic germination - fresh seed and patience are essential. They occupy the ground for most of the year but can be left in the ground all winter, improving in sweetness after hard frosts. They prefer deep, stone-free soil to produce straight, long roots and should be sown direct as they dislike transplanting.

Peas are climbing annuals that produce sweet pods over several weeks. They prefer cool conditions and can tolerate light frost. Most types need support. Pick regularly to extend the harvest window - pods left to mature on the plant signal the plant to stop producing.

Peppers and chillies need warmth and shelter to produce well in a UK climate - a greenhouse or polytunnel is ideal, though a sunny sheltered spot outdoors can work in warm summers. They require an early start indoors from January, a long growing season, and consistent heat to set and ripen fruit. Sweet peppers are picked green or left to colour; chillies build heat as they ripen.

Potatoes are a staple root crop grown from seed tubers (sets). They are susceptible to late blight in wet summers and benefit from earthing-up as they grow.

Radish is one of the fastest-maturing vegetables, ready to pull in as little as 3-4 weeks from sowing. Its speed makes it ideal for succession sowing to maintain a continuous supply, and as a catch crop slotted between slower vegetables. Summer varieties are round or elongated and mild; winter types are larger, peppery, and store well.

Rhubarb is a vigorous, low-maintenance perennial grown for its tart, pink or red stems, typically harvested from March to July. It is one of the most reliable crops for UK gardens, tolerating hard frost and poor conditions once established. Forced rhubarb - produced by covering crowns with a pot in February - yields earlier, sweeter, more tender stalks and is a traditional British delicacy.

Rocket is one of the fastest and most productive salad leaves, ready to harvest in as little as 3-4 weeks from sowing. It has a distinctive peppery, slightly bitter flavour that intensifies in hot weather and older leaves. Succession sowing every few weeks prevents the crop becoming too hot and reduces bolting, which happens rapidly in summer heat.

Rosemary is a woody, aromatic perennial herb native to the Mediterranean. It thrives in poor, dry, well-drained soils and is drought-tolerant once established. In mild climates it can be harvested year-round. Waterlogged conditions are the most common cause of failure.

Spinach is a fast-growing cool-season crop that bolts readily in heat or long days. It is best sown in spring and autumn, avoiding the height of summer. Leaves are ready quickly and can be harvested as baby leaf or left to mature. Succession sowing every 3 weeks provides continuous supply.

Spring onions are fast-maturing alliums grown for their slender stalks and mild flavour. They are well suited to small spaces and can be succession-sown from late winter to late summer for continuous supply. Also known as salad onions or bunching onions.

Winter squash and butternut types are trailing plants that spread widely but reward patience with heavy, long-storing fruit. Unlike courgettes, they are left on the plant to fully mature before harvest in autumn, developing hard skins that allow them to keep for months in a cool, dry place. They need a long growing season and warm conditions to set fruit - cloches or fleece help in marginal seasons.

Cultivated strawberries are perennial fruiting plants that spread via runners. Summer-fruiting types crop heavily over a short period; everbearing types produce smaller crops across a longer season. Beds are typically replaced every 3-4 years as productivity declines.

Sweetcorn is a tall, wind-pollinated grass that should be planted in blocks rather than rows to ensure good pollination and full cob development. It is frost-tender and needs a warm, sheltered site in the UK, growing best in a warm summer. Sugars convert to starch rapidly after picking, so cobs eaten immediately after harvest taste dramatically better than anything shop-bought.

Thyme is a hardy, low-growing perennial herb that thrives in dry, sunny conditions and poor soil. It is essentially maintenance-free once established, producing aromatic leaves year-round and attractive flowers in summer valued by pollinators. Cutting back after flowering prevents the plant becoming woody and keeps growth compact.

Tomatoes are warm-season fruiting plants grown as annuals in temperate climates. They need consistent heat, moisture, and support to thrive, and are highly susceptible to frost at any stage.

Turnips are a fast-maturing brassica that can be sown repeatedly from spring to late summer for a succession of harvests in as little as 6-8 weeks. Young roots are tender and sweet; left to grow too large they become tough and pithy. They also provide useful winter greens (turnip tops) from autumn sowings, making them a productive and flexible crop for small plots.