Why a few pots beat a whole herb bed

If your garden is a courtyard, a narrow paved strip or a balcony, you might assume herbs are out of reach. The opposite is true. Containers let you give each plant precisely what it wants, which is far harder in open ground where the soil is one size fits all. Mint wants moisture and richness; thyme and rosemary want grit and sharp drainage; basil wants warmth and steady water. Individually potted, they all get their ideal conditions — and you can move them as the sun shifts through the year.

Scent is the other argument. A herb brushed in passing releases its oils, so a pot by the back door earns its keep every time you walk past. Keep herbs close to where you cook and you will use them far more often than a bed at the bottom of the garden.

Compost, drainage and pot size

Almost every herb failure in a pot comes down to soggy roots. Use a peat-free multi-purpose compost blended with grit: roughly two parts compost to one part horticultural grit or perlite, and closer to half and half for rosemary and thyme. Terracotta suits the dry-loving herbs because it breathes; mint and basil are happier in glazed or plastic pots that hold water longer.

Size matters more than most people expect. Allow a 30cm pot for mint, 25–30cm for rosemary, 15–20cm for a single basil plant, and a wide shallow bowl for thyme, which spreads sideways rather than down.

• Check every pot has drainage holes, and raise it on feet or broken crocks so water escapes freely.
• Do not leave pots standing in saucers outdoors — in a wet British autumn that is the quickest way to lose rosemary to root rot.
• Refresh the top 5cm of compost each spring, and repot mint every other year, dividing the clump as you go.

The four herbs worth starting with

• Mint — the most forgiving of the group and the one that needs confining. It spreads by underground runners, so give it a pot to itself. Spearmint and Moroccan mint make the best tea; apple mint is milder. Partial shade suits it, and the compost should stay reliably damp.
• Thyme — full sun, gritty compost, shallow wide pot. Common, lemon and silver-leaved thymes all thrive on a certain amount of neglect, and overwatering is far more dangerous than drought. Trim lightly after flowering, and mulch the crown with grit to keep foliage dry through winter.
• Rosemary — give it the largest pot you can spare, as it resents root disturbance. Full sun, sharp drainage and shelter from cold east winds. Trailing forms such as 'Prostratus' look wonderful spilling from a raised pot. It is hardy in most of the UK, but wet cold is what kills it, so raise the pot on feet for winter.
• Basil — tender, so treat it as an annual outdoors and plant out after the last frost, usually late May or early June. It wants warmth, sun and even moisture but hates sitting wet. Greek basil is compact and suits a small pot; sweet Genovese has the best flavour for cooking.

Place them within arm's reach of the door

Group pots rather than scattering them. A cluster creates its own humid microclimate and looks far more generous than a row of solitary plants. Put the sun-lovers — thyme, rosemary, basil — at the front where they catch the best light, and tuck mint slightly behind, where its compost stays cooler.

Position matters to the nose too. Thyme is low and releases scent when brushed, so a pot beside a step or along a path works hard. Rosemary grows tall enough to stand by a seating area, where a hand swept through the branches as you pass is a small daily pleasure.

Watering, feeding and the seasonal rhythm

In summer, small pots dry out fast. Water in the morning, aiming at the compost rather than the leaves, and check daily in hot spells — basil can go from lush to limp in an afternoon. Thyme and rosemary should be watered thoroughly, then left to almost dry out before the next drink. Feed lightly: herbs grown for scent do best on modest rations, since too much nitrogen gives soft growth and weaker oils. A diluted liquid feed every fortnight through summer is plenty. Stop by early September so growth hardens off.

In autumn, bring basil indoors to a bright windowsill before the first cold nights. Raise rosemary and thyme onto feet, shelter them from the worst of the wet and wind, and water sparingly. Thyme will come through a cold snap happily if its feet are dry.

Harvesting so the plants keep giving

Regular picking keeps a herb pot bushy. Take no more than a third of the plant at a time, cutting just above a pair of leaves so new shoots break from the joint. Mint responds to hard cutting with fresh stems; basil needs its tips pinched every couple of weeks to stop it flowering and turning woody. With thyme and rosemary, snip the soft new growth rather than cutting into old, leafless wood, which rarely regrows.

Watch for aphids on basil, rosemary beetle on the rosemary, and the orange spots of mint rust, best dealt with by cutting the plant back hard and clearing the affected leaves. A well-drained, well-tended pot shrugs off most problems on its own. Few things make a small garden feel more generous than stepping outside with a pair of scissors and coming back with dinner.