Growing Herbs in Small Urban Gardens

Why Herbs Earn Their Place in a Small Urban Garden

If you have a yard the size of a bath mat, a balcony, or a shared courtyard behind a terraced house, herbs are the most generous crop you can grow. A supermarket basil pot costs more than a packet of seed, wilts within days, and gives you a handful of leaves. The same plant grown on a sunny doorstep will keep you in cuttings from May to October — and it looks and smells beautiful while it does it. Herbs also forgive the two things that trip up small-space growers: they don't need deep soil, and they don't need a proper veg patch.

Best of all, they earn their keep in the kitchen. Fresh mint for new potatoes and summer drinks, thyme for roast chicken, basil torn over tomatoes — these are the flavours that make a simple meal taste like more than the sum of its parts.

Find the Sunniest Wall You Have

Most culinary herbs come from the Mediterranean and want sun — ideally six hours or more a day. A south- or west-facing wall is the prize spot in any small garden. Brick and stone soak up warmth during the day and release it slowly after dark, which suits tender herbs such as basil and rosemary and can extend your season by several weeks at either end.

If your only space is shaded for part of the day, don't despair. Mint, chives, parsley and chervil all manage in light shade and are happy in a pot by a kitchen door. Just be realistic about basil and thyme, which sulk and stretch in low light.

Two urban quirks are worth planning around:

• Wind tunnels. Gaps between buildings and along alleyways funnel gusts that snap tall stems and dry pots out fast. Group pots together, and use a low hurdle or a row of sturdier plants as a windbreak.
• Rain shadows. Pots tucked under eaves or against a fence often stay dry even after a downpour. Assume you'll be watering by hand, not relying on the weather.

Pots, Compost and Drainage

Bigger pots are kinder pots. A 25cm pot holds enough compost to buffer a hot afternoon; a tiny 10cm pot will dry out twice a day in July. For a single basil or mint plant, aim for 25–30cm across. Terracotta looks lovely and breathes well, but it dries out faster than glazed or plastic — worth knowing if you're out at work all day.

Drainage matters more than pot style. One generous hole at the base beats a layer of gravel, which actually raises the water table inside the pot. Use a peat-free multipurpose compost for hungry herbs like mint and basil, and mix in some soil-based potting compost plus a handful of horticultural grit for thyme, rosemary and oregano.

Lift pots onto feet or broken tiles so water can escape freely, and use saucers in summer to catch the overflow — but empty them after heavy rain.

Three Herbs to Start With

Mint, thyme and basil are the reliable trio for a small urban space, and each has its own quirks.

• Mint. Grow it in its own pot, always — it spreads by underground runners and will swamp anything sharing its compost. Spearmint and Moroccan mint are best for cooking and tea. Keep it consistently moist and cut it hard: stems trimmed to about 5cm will send up fresh, tender growth within a fortnight.
• Thyme. The opposite temperament. Common or lemon thyme wants gritty, free-draining compost, a hot spot at the front of a wall, and very little fuss. Let it dry out between waterings, top-dress the surface with grit to keep foliage off damp compost, and trim lightly after flowering to keep it compact.
• Basil. Tender and heat-loving, so wait until late May or June before putting it outside. A supermarket pot can be split into three or four plants — tease the roots apart gently and pot each one on. Pinch out the growing tips regularly and remove flower buds the moment they appear.

Watering and Feeding Through the Season

Pots dry out from the top down, so a quick splash rarely reaches the roots. Water thoroughly until it runs out of the base, ideally in the morning, and check by weight: a light pot means it's dry. In a hot spell you may need to water daily, sometimes twice.

Feeding matters because compost only holds so much goodness. From June onwards, give mint and basil a diluted liquid tomato feed every fortnight. Thyme, rosemary and oregano need far less — once a month at most, or none at all if they're growing strongly.

Keep an eye out for aphids on soft new growth and vine weevil grubs in containers. A saucer of water under a pot is an invitation to slugs, so raise pots on feet instead.

Harvest Often, and They'll Grow Bushier

The single most common mistake with herbs is being too timid. Regular picking is what turns a spindly seedling into a bushy, productive plant.

• Basil: pinch the stem just above a pair of leaves. Two new shoots will grow from that point.
• Mint: cut whole stems rather than picking leaf by leaf, and never take more than a third of the plant at once.
• Thyme: snip the tips with scissors, avoiding the woody older stems, which won't reshoot.

As autumn arrives, bring tender herbs indoors to a bright windowsill and take cuttings of mint and basil in late summer as insurance. Hardy thyme will stay outside happily, though it pays to move pots against a wall and ease off the watering.

Start with three pots by a sunny wall, water them properly, and pick from them constantly. Within a few weeks you'll have more herbs than a supermarket ever sold you — and a corner of your small garden that smells wonderful every time you walk past it.