Why Little and Often Beats One Big Sowing

Every spring, plenty of us sow a whole packet of lettuce in one enthusiastic afternoon. Six weeks later there is more salad than any household can eat, the plants stand unpicked and start to run to seed, and by July the bed is bare. The fix is simple: sow small batches every two to three weeks instead. Each sowing is tiny — a pinch of seed in a pot, or a short row the length of your forearm — but the harvests overlap, so there is always something at the perfect stage.

Succession sowing also spreads your risk. A late frost, a slug raid or a fortnight of relentless heat will only knock out one batch rather than the lot. And because you are harvesting young, tender leaves rather than waiting for hearts, most crops are ready in three to six weeks from sowing.

Pick Crops That Regrow

The best choices for small spaces are cut-and-come-again crops: you snip the leaves and the plant produces more. Aim for a mix of textures and speeds.

• Loose-leaf lettuce — 'Salad Bowl', 'Lollo Rossa' and similar. Ready in about four weeks, regrows two or three times.
• Rocket — the fastest of the lot, often usable in three weeks. Sow little and often, as it bolts quickly in heat.
• Spinach — slower, around five to six weeks, but productive and happy in partial shade. Perpetual spinach (spinach beet) is tougher and crops for months.
• Mizuna, mustard and pak choi — peppery, quick and excellent for a late-summer sowing when lettuce sulks.
• Corn salad (lamb's lettuce) — sow in late summer for autumn cutting.

Two or three of these in rotation will give you a far better bowl than a single variety sown all at once.

A Simple Sowing Calendar

In most of the UK you can sow outdoors from late March to early September, with the exact dates shifting with your local climate. A workable pattern looks like this:

• Late March to April: first sowings under fleece or in a cold frame. Lettuce, rocket, spinach.
• Late April to mid-June: sow a small batch every two weeks outdoors. This is the peak period.
• July to mid-August: switch to heat-tolerant types and sow in the shade. Every ten to fourteen days, because growth is fast and bolting quicker.
• Late August to early September: final outdoor sowings of rocket, mizuna and corn salad, plus lettuce under cover.

Write the sowing date on a plant label or in your phone. It is surprisingly easy to lose track, and the whole system depends on knowing when the next batch is due.

Small Spaces, Big Returns

You do not need a vegetable bed. A 30cm-diameter pot, at least 20cm deep, holds a generous cut-and-come-again sowing. A 60cm windowsill trough will keep a household in leaves through summer. Even a couple of old mushroom trays lined with compost will do, provided you drill drainage holes.

Fill containers with multipurpose compost, firm it gently and water before sowing. Scatter seed thinly — roughly 20 to 30 seeds per 30cm pot — then cover with about 5mm of compost or vermiculite. For beds, sow in bands about 10cm wide rather than rows, which makes cutting easier.

If space is really tight, sow into seed trays and transplant small clusters into gaps between other crops, or use the edges of pots holding tomatoes and courgettes. Salad leaves are shallow-rooted and content as underplanting.

Keeping Leaves Tender, Not Tough

Tough, bitter leaves almost always come down to stress: dry roots, scorching sun or crowding. Water little and often, preferably in the morning, and never let containers dry out completely — compost that has gone bone dry is hard to rewet. In July and August, move pots to a spot that gets morning sun and afternoon shade, or drape a piece of shade netting over a frame.

Thin seedlings to about 5cm apart once they have two true leaves. It feels wasteful, but crowded seedlings compete, bolt and produce thin, sad leaves. The thinnings themselves are excellent in a sandwich.

Watch for slugs and snails, which do most damage overnight and after rain. Pigeons will strip young leaves in a single sitting, so net or fleece low sowings until they are established. In dry weather, flea beetle peppering rocket is a sign to water more and keep plants growing steadily.

Harvesting So the Plants Keep Going

Cut with scissors when leaves are around 8 to 10cm tall, taking them 2 to 3cm above the base and leaving the growing point intact. Harvest in the cool of the morning for the crispest leaves. Most crops will regrow two or three times before they weaken or run to seed.

For lettuce grown for hearts, pick the outer leaves first and let the centre develop. And when a batch does finally bolt, don't compost it in a hurry: rocket and mustard flowers are edible, and the bees will thank you. Then simply sow the next pinch of seed, and keep the cycle turning.