Growing Parsley on a Windowsill

Parsley is one of the best herbs for a kitchen windowsill. It is compact, genuinely useful in everyday cooking, and more forgiving of indoor conditions than sun-hungry herbs like basil. With nothing more than a deep pot and a bright sill, you can keep a small supply of fresh leaves within arm's reach of the chopping board for most of the year.

This guide covers the indoor side of things — the pot, the light, watering and feeding, and how to rescue a supermarket pot so it actually lasts. For the full picture of sowing, varieties and growing parsley outdoors, see the main parsley guide.

Why parsley suits indoor growing

A few herbs sulk indoors. Parsley is not one of them. It earns its place on the windowsill for three reasons.

First, it stays compact. A pot of parsley happily holds its size for months, so it won't sprawl across the sill or topple over like a leggy basil plant.

Second, it is in constant demand in the kitchen — chopped into sauces, scattered over potatoes, stirred through a salad. A herb you reach for daily deserves to live where you cook.

Third, parsley is fairly shade-tolerant compared with Mediterranean herbs such as rosemary and the wider Mediterranean herbs. It still wants the brightest spot you can give it, but it copes with the lower light of a UK home far better than sun-lovers do. That tolerance is what makes year-round indoor parsley realistic in our climate.

The right pot

The single most important thing about a parsley pot is depth. Parsley is a member of the carrot family and forms a long taproot, so it resents a shallow container. A short, wide pot quickly leaves the plant rootbound, hungry and prone to bolting.

Aim for a pot at least 15cm deep — 18–20cm is better. A standard plastic plant pot, a deep ceramic pot, or even a tall mug-style planter all work, as long as the roots have room to go down.

Drainage is the other non-negotiable. The pot must have holes in the base, and it should sit on a saucer so you can tip away any water that collects. Parsley wants steady moisture but hates sitting in a waterlogged pot — soggy roots are the fastest way to kill an indoor herb.

Fill with a good multipurpose or peat-free potting compost. If you make your own, a home-made compost blended with bought potting compost gives a lovely free-draining mix. Either way, give it a long drink after potting and let it drain fully before the pot goes back on its saucer.

Light: the make-or-break factor

Light is what decides whether your windowsill parsley thrives or limps along. Indoors, the brightest sill you have is the right one — usually a south- or west-facing window. An east-facing window works too, though growth will be a touch slower.

Parsley grown in too little light tells you plainly: the stems stretch tall and thin, the leaves turn pale, and the whole plant looks reachy and weak. That legginess is not a variety problem or a watering problem — it is the plant straining towards a light source that isn't strong enough. The fix is simply more light.

Turn the pot a quarter-turn every few days so it grows evenly rather than leaning towards the glass. In the short, grey weeks of December and January, even a bright sill struggles, and a small grow light makes a real difference to keeping leaves coming. For the full rundown of which windows work, how to read leggy growth, and when to add supplementary light, see our guide to windowsill growing.

Watering and feeding indoors

Indoor parsley likes its compost evenly moist — never bone dry, never sodden. The reliable test is your finger: push it into the top 2–3cm of compost, and water only when that layer feels dry. In a warm kitchen in summer that might mean every couple of days; in a cool room in winter, perhaps once a week.

Water at the base rather than over the leaves, and always tip away anything that pools in the saucer. Central heating dries the air and the compost faster than you'd expect, so check more often once the radiators come on.

Feeding matters more indoors than out, because a potted plant only has the nutrients in its compost to draw on. After about six weeks, start giving a half-strength liquid feed every couple of weeks through the growing season — a general-purpose or seaweed feed is ideal. Ease right off through the darkest months, when the plant isn't growing much and doesn't need it.

Buying a supermarket pot and rescuing it

That supermarket pot of parsley can be a brilliant head start — but only if you treat it right. Those pots are grown fast and packed with dozens of seedlings crammed into a tiny rootball. Left as they are, they exhaust themselves within a fortnight and flop.

The rescue is to split and re-pot. Tip the plant out, gently tease the dense clump into two, three or four smaller sections, and pot each one into its own deep pot of fresh compost. Spread them across the household — a couple of pots on the kitchen sill, one elsewhere — so no single clump is overcrowded. Water them in, keep them out of harsh midday sun for a few days while they settle, and they'll romp away with far more vigour than the original supermarket pot ever managed.

This works for most soft supermarket herbs, not just parsley. For the full method — including which herbs to split, which to simply pot up whole, and how to nurse a tired pot back to health — see keeping supermarket herbs alive.

Harvesting little and often

The golden rule with windowsill parsley is to pick little and often. Regular light harvesting keeps the plant bushy and productive; stripping it bare in one go sets it back for weeks.

Always harvest from the outside of the plant. Snip the older, outer stems right down at the base, and leave the young central growth to carry on. Never take more than about a third of the plant at once, and let it recover before the next cut.

A well-tended pot will give you fresh leaves for many months. Eventually — usually in its second year — parsley sends up a flower stalk and runs to seed; once that happens the leaves turn bitter and it's time to start a fresh pot. Because of this, it's worth sowing a new pot every few months so you always have a younger plant coming on. There's more on sowing, getting parsley to germinate, and the longer-term care of plants in the main parsley guide.

Once you've got the hang of a pot of parsley, the same windowsill will happily host chives, mint in pots and other easy herbs alongside it. Browse the rest of the herbs section to build up a proper little indoor kitchen garden.