Growing Herbs on a Kitchen Windowsill

Why a windowsill is the best place to start

There is something quietly satisfying about snipping a few leaves of basil into a pan of tomatoes while rain streaks the window in front of you. A kitchen windowsill is the smallest, most forgiving growing space you have — no garden, no allotment, no balcony required. What it does need is light, and plenty of it. Most culinary herbs are Mediterranean plants at heart, so they want six hours or more of direct sunshine a day. A south-facing sill is ideal, east or west will do for softer herbs such as mint, parsley and chives, and a north-facing window will leave even the toughest plant pale and leggy.

If your best window is shaded, don't give up. A cheap LED grow light on a timer turns a gloomy corner into something workable, and it uses very little electricity. Rotate your pots a quarter turn every few days too — plants lean towards the light, and a weekly twist keeps them growing straight instead of stretching sideways.

Choose herbs that genuinely cope indoors

Not every herb enjoys life in a centrally heated flat. The reliable performers are worth knowing before you spend a penny.

• Basil — thrives in warmth, hates cold draughts and soggy roots. Pinch the tips often.
• Mint — almost unkillable, but must have its own pot or it will smother everything else.
• Chives — happy in a modest window, and regrows quickly after cutting.
• Flat-leaf parsley — slower to establish, then crops for months on end.
• Thyme, oregano and rosemary — need the brightest sill you have and far less water than you'd expect.
• Coriander — grows fast but bolts in heat, so sow little and often rather than one big pot.

Supermarket pots of living herbs are a false economy on their own, but they are a brilliant starting point. Split a crowded pot into two or three, tease the roots apart gently, and replant into fresh compost. You'll get far more life out of them than leaving them crammed together on the shelf.

Pots, compost and drainage

Herbs hate sitting in water, and most indoor plant deaths come down to drowning rather than drought. Every pot needs drainage holes at the bottom — if you've fallen for a beautiful glazed pot with a sealed base, keep the plant in a smaller plastic or terracotta pot inside it and lift it out to water.

Aim for pots around 12–15cm across for single plants. Terracotta breathes and suits thyme and rosemary beautifully; plastic holds moisture longer, which basil appreciates. Always use peat-free multipurpose or loam-based compost, which is now widely available and far kinder to the bogs and wildlife that peat extraction destroys. Fill to about 2cm below the rim so you can water properly without it spilling over the edge.

Stand pots on saucers filled with a layer of pebbles and keep a little water in the base. As it evaporates, it raises the humidity around the leaves — a small kindness that basil and mint repay generously in a dry, heated kitchen.

Watering and feeding without guesswork

Stick a finger into the compost up to the first knuckle. If it feels dry at that depth, water. If it's damp, walk away. That single habit will save more herbs than any gadget. Water in the morning where you can, aiming at the compost rather than the leaves, and let the pot drain fully before returning it to its saucer.

From spring to early autumn, feed every fortnight with a diluted liquid seaweed or general-purpose plant food at half the recommended strength. In winter, most herbs slow down dramatically and need little or no feeding — and considerably less water. Yellowing lower leaves usually mean waterlogging or a hungry plant, so check the compost before you reach for the bottle. A quick trim also helps: air moving around the plant is one of the best defences against the whitefly and mildew that plague overcrowded windowsills.

Harvesting so the plant keeps giving

Regular picking is not theft — it's pruning, and it makes plants bushier. Never strip a plant bare, and never take more than a third of the foliage at once.

• Pinch basil just above a pair of leaves, which encourages two new shoots to form.
• Snip chives with scissors about 3cm from the base; they'll come back within a fortnight.
• Take parsley and coriander leaves from the outside of the plant, leaving the centre to keep growing.
• Harvest thyme and rosemary in short sprigs from the tips, never into the old woody stems.

Use herbs the moment you cut them. Leaves lose their aromatic oils within hours, so a handful thrown into a salad or stirred through pasta at the last minute tastes worlds apart from a tired bunch from the back of the fridge.

A small windowsill, a lighter footprint

Growing even a few herbs at home quietly reduces waste. You buy only what you need, so there's no half-used plastic packet turning to slime in the drawer. Reuse glass jars, old tins or chipped mugs as pots, collect rainwater in a jug when it pours, and save seed from a plant that bolts and flowers — coriander and basil both set viable seed happily indoors.

Split and share plants with neighbours, take cuttings from a friend's mint, and swap a spare pot of thyme for a jar of something homemade. It's a modest kind of self-sufficiency, but it connects the kitchen to the seasons in a way that a supermarket shelf never quite manages. Start with one pot of basil. The rest tends to follow.