There is something deeply satisfying about snipping a handful of fresh leaves for your lunch, even if your growing space amounts to a single window box. Cut-and-come-again salads are the perfect solution for balconies, courtyards, and tiny patios, giving you weeks of harvests from one sowing. The secret lies in choosing the right varieties, sowing thickly in shallow containers, and picking regularly to encourage fresh growth. Here is how to keep your bowls full from late spring right through to the first frosts.

Why cut-and-come-again suits small spaces

Unlike hearting lettuces that need a full season to mature, cut-and-come-again crops are grown for their young leaves. You sow them densely, then harvest with scissors when the leaves are just a few centimetres tall. The plants respond by sending up new shoots, so you can return for repeat pickings every week or so. This makes them ideal for troughs and window boxes because they don't need deep soil or much room. A container just 15cm deep and 30cm long can yield several generous handfuls over many weeks. They also grow quickly, often ready in three to four weeks from sowing, which means you can resow gaps for a continuous supply. Succession sowing—little and often—is the key to avoiding a glut followed by a barren spell.

Choosing containers and compost

Any container that holds compost and has drainage holes will do. Window boxes, old washing-up bowls, wooden crates, and even sturdy fabric grow bags work well. Aim for a depth of at least 15cm; deeper is better for moisture retention. Terracotta dries out quickly, so glazed or plastic containers are often easier to manage in sunny spots. Fill with a good-quality peat-free multipurpose compost. This holds moisture and nutrients well for the short life of these crops. If you are reusing old compost, mix in some fresh compost and a handful of slow-release organic fertiliser. Before sowing, water the compost thoroughly and let it drain. Never let containers sit in a saucer of water—salad roots rot quickly in waterlogged conditions.

Best varieties for troughs and window boxes

Look for seed packets labelled 'cut-and-come-again' or 'baby leaf'. Loose-leaf lettuces are the classic choice: 'Salad Bowl' (red or green), 'Oakleaf', and 'Lollo Rossa' all regrow reliably. For a bit of bite, add rocket, mizuna, mustard greens, and pak choi. Spinach and chard also work well if picked young. A mix of textures and colours makes every harvest look appealing.

• Lettuce: 'Catalogna', 'Amish Deer Tongue', 'Red Salad Bowl'
• Rocket: wild or cultivated, both fast and peppery
• Asian greens: mizuna, tatsoi, red mustard
• Spinach: 'Baby Leaf' types are ideal
• Herbs: coriander, chervil, and dill can be treated the same way

Avoid tight-hearted varieties like iceberg or cos, which need more space and time to mature.

Sowing for a steady supply

The easiest method is to sow directly into your final container. Scatter seeds thinly over the surface—aim for roughly one seed every centimetre. Cover with a fine layer of compost, about 5mm deep, and water gently with a fine rose. Keep the compost moist but not soggy. Germination usually takes 7–14 days, depending on the temperature. To avoid a feast-or-famine cycle, sow a new small container every two to three weeks from early spring until late summer. If you have limited space, sow half a trough at a time, then fill the other half a fortnight later. Thinning is rarely needed for cut-and-come-again crops; dense sowing actually helps keep the leaves tender and supports each other as they grow.

Day-to-day care

Water regularly, especially in warm weather. Small containers dry out fast, so check the compost daily by pressing a finger in to the first knuckle. If it feels dry, water until it runs out of the drainage holes. A mulch of compost or worm castings helps conserve moisture. Feed with a diluted liquid seaweed or organic fertiliser every fortnight once the leaves start growing strongly. Pests are the main challenge. Slugs and snails can decimate a window box overnight, so go out with a torch after rain and remove them by hand. Aphids cluster on new shoots; a strong jet of water dislodges them. Fleece or fine mesh over a frame keeps flea beetles, pigeons, and cabbage white butterflies at bay without chemicals. Good air circulation helps prevent damping off and mildew, so don't overcrowd your containers more than necessary.

Harvesting and keeping the leaves coming

Harvest when leaves are 5–10cm tall. Use sharp scissors or snips to cut just above the growing point, about 2–3cm from the base. Take the outer leaves first, or cut across the whole container if you want a mixed handful. Never strip a plant bare; leave at least a third of the foliage to fuel regrowth. After cutting, water well and give a diluted feed to encourage a quick flush of new leaves. Most mixes will give you three or four good cuts before growth slows or the plants bolt in hot weather. When that happens, pull them out, refresh the compost, and sow again. In late summer, sow winter-hardy varieties like 'Winter Density' lettuce, corn salad, and land cress for pickings into autumn and even through mild winters under a cloche. With just a few containers on rotation, you can keep your salads crisp, colourful, and utterly fresh for months on end.