Sophie Barnes
Why Herbs in Pots Earn Their Keep
A supermarket bunch of basil is usually three or four cuttings crammed into a plastic sleeve, already sulking, and half of it will be black by Thursday. A basil plant on your windowsill, by contrast, gives you a pinch of leaves whenever you need them — and keeps giving for months if you treat it well. That is the real argument for pot-grown herbs: not the money saved, but the constant supply of genuinely fresh leaves, cut seconds before they go into the pan.
Pots also suit the way most of us cook. You rarely want a whole row of parsley; you want a few sprigs for a salad, a handful of chives on new potatoes, a single bay leaf in a stew. Containers let you grow exactly the herbs you reach for, in exactly the quantities you use, without giving over half the garden to them.
Which Herbs Grow Best in Containers
The starting point is understanding what kind of plant you are dealing with. Soft, leafy herbs such as basil, coriander and parsley are thirsty, hungry and short-lived. Woody Mediterranean herbs such as rosemary, thyme and oregano are the opposite: they want sharp drainage, lean compost and a bit of neglect. Group them accordingly, because a rosemary sharing a pot with basil will either drown or starve, depending on who wins.
Reliable performers in pots include:
- Basil — the classic windowsill herb. Needs warmth, sun and steady moisture.
- Parsley — flat-leaved is more flavoursome than curly. A deep pot suits its taproot.
- Chives — tough, forgiving, and one of the few herbs that will tolerate a north-facing spot.
- Mint — superb in pots precisely because it cannot escape. Always give it its own container.
- Rosemary, thyme and oregano — happy in a sunny, sheltered spot with gritty, free-draining compost.
- Coriander — fast and generous, but it bolts in heat. Sow little and often rather than once.
- Sage and bay — long-lived, shrubby and handsome enough to justify a decent-sized pot.
Dill, chervil and summer savory are all worth a go too, though they resent root disturbance, so sow them where they are to grow.
Choosing the Right Spot
Most culinary herbs want sun, and plenty of it — six hours a day is a reasonable target. A south- or west-facing windowsill, a sunny doorstep or a patio against a warm wall will all do. On a windowsill, remember that the glass magnifies heat, so plants can scorch in a hot summer and dry out fast; rotate pots a quarter turn each week so they grow straight rather than leaning into the light.
Mediterranean herbs are the exception to the rule about shelter. Rosemary and thyme actively enjoy a breezy, exposed position because good air movement keeps foliage dry and reduces problems. Basil, on the other hand, hates cold draughts and anything below about 10°C, so bring it indoors in September if you want to stretch the season.
Pots, Compost and Drainage
Size matters more than style. A 2-litre pot will do for a single basil or chive plant; give parsley, sage and rosemary 5 litres or more, and a bay tree something closer to 15 litres. Terracotta looks lovely and breathes well, but it dries out quickly in summer — plastic or glazed ceramic holds moisture for longer, which is a real advantage for leafy herbs. Whatever you choose, drainage holes are non-negotiable.
Use a peat-free multipurpose compost for soft herbs, and mix in around a quarter by volume of horticultural grit for the woody ones. A handful of grit in the base of the pot helps too. Raise pots onto feet or broken tiles so water can drain freely rather than pooling underneath.
Watering and Feeding Through the Season
Containers dry out far faster than borders, especially in July. Check daily in warm weather by pushing a finger into the compost up to the first knuckle — if it feels dry at that depth, water until it runs out of the bottom. Little and often beats a sporadic soaking. Soft herbs in active growth appreciate a weak liquid feed every fortnight; a tomato feed is ideal for basil and parsley. Woody herbs need far less — a feed in spring is generally enough, and too much richness makes them floppy and bland.
Watch for greenfly on basil and parsley, and for slugs and snails if pots sit on the ground. A saucer of beer or a nightly patrol works as well as anything.
Harvesting to Keep Plants Productive
Regular picking is what keeps a pot herb bushy rather than leggy. Pinch out the growing tips of basil just above a pair of leaves to encourage branching, and never strip more than a third of the plant at once. Cut chives about 2cm from the base and they will regrow within a fortnight. With parsley, take the outer stems first and leave the crown to keep producing. Rosemary, thyme and sage can be trimmed lightly all year, but avoid hard cutting into old, woody growth — it rarely reshoots.
Feed, water and pick, and a modest collection of pots will quietly outperform anything you could buy in a plastic sleeve.
