Why strawberries love a basket or a pot

Strawberries are one of the best crops for a small UK garden, and they are arguably even better in containers than in the ground. Grown at waist or eye level, the fruit hangs clear of the soil, so it stays clean, dries quickly after rain and is much less likely to be nibbled by slugs. You can pick a handful on the way past the back door rather than tramping down the garden with a bowl.

Containers also solve the space problem. A single 35–40cm hanging basket will hold three to five plants, and a row of pots along a sunny wall, a balcony railing or a windowsill can produce several punnets across the season. Strawberries are shallow-rooted, so they do not need deep soil, and they crop happily in a spot too small for a raised bed. Best of all, you can move them: into the sun to ripen, under cover to dodge a wet spell, or out of reach of a hungry blackbird.

Choose the right strawberry for your space

Not all strawberries behave the same way, and picking the right type saves a lot of disappointment.

• Summer-fruiting varieties give one heavy crop over three or four weeks in June and July. They produce plenty of runners, which makes them easy to propagate, but in a hanging basket those runners will trail down and can look untidy.
• Perpetual or everbearing types fruit in flushes from early summer into September. They are ideal for pots because they keep going for months and tend to throw fewer runners.
• Alpine strawberries are small, intensely flavoured and remarkably tough. They crop continuously, tolerate light shade and rarely run. Perfect for a north-facing windowsill or a herb pot by the door.

For baskets, look for trailing types that cascade rather than stand upright — they show the fruit off beautifully and are easier to pick. For pots, a mix of one summer-fruiting variety and one perpetual gives you a long, generous season. Buying bare-root crowns in late summer or autumn is cheapest, but pot-grown plants will settle in at almost any time from spring onwards.

Planting up: compost, containers and depth

Use a container at least 20cm deep with good drainage holes. Terracotta looks lovely but dries out fast, so a plastic or glazed pot is more forgiving, or line a terracotta pot with a plastic inner. For hanging baskets, a coir or fabric liner holds moisture better than bare wire.

Fill with a peat-free multipurpose compost mixed with a couple of handfuls of garden compost or well-rotted manure for body, plus a slow-release general fertiliser. Strawberries crop hard in a small volume of compost, so they need the reserves. If you can, add water-retaining granules or a thin layer of wool pellets, which also deter slugs.

• Space plants 20–25cm apart in a pot or basket; alpines can go closer, at about 15cm.
• Plant with the crown exactly at compost level — bury it and the plant rots, leave it proud and it dries out.
• Water in well and keep the compost moist for the first fortnight while roots establish.
• Mulch the surface with straw, wool pellets or even shredded paper to keep fruit off the compost.

Watering and feeding through the season

Baskets and small pots dry out quickly, especially in a warm, breezy spot. Little and often beats a weekly soak: check daily in summer and water in the morning so foliage dries before evening. If a basket does dry out completely, plunge the whole thing into a bucket of water until the compost stops bubbling and feels heavy again.

Start feeding when the first flowers open. A high-potassium tomato feed, diluted as directed, given once a week keeps the fruit coming and improves flavour. Too much nitrogen gives you leafy plants and few berries, so avoid general-purpose feed once flowering begins. In very hot spells, move containers into light afternoon shade — strawberries sulk when their roots cook.

Pollination, pests and wildlife-friendly growing

Strawberries are self-fertile, but a visit from a bee produces bigger, better-shaped fruit. Give pollinators a reason to call by growing lavender, borage, chives or calendula in pots alongside. Keep flowers close to the strawberries so insects move between them, and avoid covering plants with netting during flowering.

Birds are the biggest thief of container strawberries. Fine mesh or fleece draped over a frame works well; avoid loose plastic netting, which tangles small birds and hedgehogs. Blackbirds will take fruit the moment it colours, so net just as the berries begin to blush. Slugs are less of a problem in baskets, though vine weevil grubs can hollow out roots in pots — check for pale grubs when you repot and use nematodes if you find them.

A few aphids can be squashed by hand or washed off with a firm spray of water, which also discourages red spider mite in hot, dry weather. Leaving a few over-ripe berries for the birds is a fair trade for the pollination and pest control you get in return.

Picking, runners and keeping plants going

Pick when the berries are fully red and slightly soft at the tip, ideally in the cool of the morning. Strawberries do not ripen much after picking, so taste one before you fill the bowl. Eat them the same day if you can — that is one of the great pleasures of growing them near the kitchen door.

Cut off runners unless you want new plants, as they sap energy from fruiting. To make free plants, peg a runner into a small pot of compost while still attached to the parent, water it, and separate it once rooted. After cropping, tidy away old leaves and spent flower stems. In autumn, move pots to a sheltered spot, raise them onto feet or bricks so they are not sitting in winter wet, and water sparingly. Plants crop best in their first two or three years, so plan to replace them with fresh runners or new crowns regularly. That way you always have young, vigorous plants and a steady supply of sweet berries within arm's reach of the kitchen.