Growing Herbs in Small British Gardens

Why Herbs Earn Their Space

Even the smallest British garden — a courtyard, a balcony, a narrow strip beside a path — can keep a household in fresh herbs from April to October. Herbs are generous plants. They cope with cramped roots, they forgive a bit of neglect, and the more you cut them, the more they produce. A single 30cm pot of mint will happily supply a family all summer, and a rosemary trained against a warm wall will keep going for a decade or more.

The trick is matching the right herb to the right spot. Most of the herbs we cook with come from the Mediterranean and want sun, sharp drainage and lean soil. A few — mint, parsley, chives — prefer richer ground and a little shade. Get that pairing right and the rest is simply regular picking.

The Best Herbs for Pots and Narrow Borders

If space is tight, concentrate on the herbs you actually use. These six earn their keep:

• Rosemary — a woody evergreen that suits a large pot or a sunny border edge. Upright varieties stay compact; prostrate ones will tumble over a low wall.
• Mint — always grow it in its own pot. It spreads by underground runners and will colonise a border within a season if you let it. Spearmint is best for cooking, Moroccan mint for tea.
• Parsley — flat-leaved Italian types have the stronger flavour. It has a long taproot, so use a deep pot rather than a shallow trough, and sow again each spring because plants run to seed in their second year.
• Thyme — perfect for the front of a narrow border or a windowsill pot. It likes poor, gritty soil and hates being fussed over.
• Chives — neat clumps with edible purple flowers. Cut them right back to 2cm and they will regrow within a fortnight.
• Bay — clip it into a standard for a pot by the door. Slow-growing, tolerant of shade, and useful all year.

Add basil and coriander in pots on a sunny windowsill or in a greenhouse, as both sulk in cold, wet British summers.

Compost, Drainage and the Right Pot

Drainage matters more than richness. For rosemary, thyme, sage and bay, mix a peat-free multipurpose compost with roughly a quarter horticultural grit by volume. For mint, parsley and chives, plain multipurpose compost is fine, with a handful of grit at the bottom of the pot.

Terracotta looks lovely but dries out quickly in a heatwave; glazed or plastic pots hold moisture better. As a rough guide, mint and parsley need a 30cm pot, rosemary and bay 35cm or more. Always check that water can escape freely — a pot standing in a full saucer is the quickest way to kill a Mediterranean herb.

Planting a Narrow Border

A 45cm-wide strip is plenty. Put rosemary or sage at the back against a south- or west-facing wall, thyme and chives along the front, and sink a pot of mint into the soil to stop it running. Leave 30–40cm between plants so air can move through them; cramped herbs develop mildew and woody, unproductive stems.

If your soil is heavy clay, fork in grit and compost before planting and raise the bed slightly. Herbs will rot in waterlogged ground over winter, which is the single most common reason a rosemary dies in its first year.

Watering, Feeding and Cutting for Steady Harvests

From June to August, pots may need watering every day, and twice on hot, breezy days. Water in the morning so foliage dries before evening. Border-grown herbs need help only during dry spells.

Feed lightly. Mediterranean herbs grown in rich compost produce soft, flavourless leaves, so a weak liquid feed every three weeks is plenty. Mint, parsley and chives appreciate a fortnightly feed during the growing season.

The golden rule for harvesting is to keep pinching. Take tips regularly rather than stripping whole stems, and never remove more than a third of the plant at once. Pinching out the growing tips of basil and mint encourages bushy sideshoots instead of one leggy stem. Rosemary and thyme should be trimmed lightly after flowering, but avoid cutting back into old, bare wood, as it rarely regrows.

Overwintering and Simple Troubleshooting

British winters are more often wet than bitterly cold, and it is the damp that does the damage. Stand pots on feet or bricks so water drains away, and move tender herbs such as basil indoors before the first frosts. Rosemary, bay and thyme in pots will come through most winters in a sheltered spot against a wall; in hard frosts, drape fleece over them.

• Yellowing leaves — usually waterlogging. Check the drainage holes and ease off the watering can.
• Leggy, sparse growth — too little light or too little picking. Move pots into more sun and start pinching.
• Slugs on parsley and basil — patrol after rain, or raise small pots onto a gravel-topped shelf.
• Mint looking tired by midsummer — cut the whole clump back to 5cm and water well. Fresh growth arrives within two weeks.

With a handful of pots and a sunny corner, you can be cutting your own parsley, mint and rosemary within weeks — and picking far better flavour than anything wrapped in plastic at the supermarket.