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How to Grow Herbs Indoors in Winter: A Simple Windowsill Guide

Fresh green basil leaves growing indoors
Winter · Indoor Herbs

Fresh Herbs All Winter, Right on Your Windowsill

When the garden goes quiet, your kitchen window can keep the harvest going.

There is something special about cutting a few leaves of fresh basil or chives in the middle of January, when everything outside is grey and frozen. And it doesn't take a greenhouse. A bright windowsill, the right herbs, and a few simple habits are enough.

The hard part is not planting, it's keeping them alive. Short days, dry heating air, and too much water kill more indoor herbs than anything else. Here is how to avoid all three and keep your herbs growing until spring.

The Biggest Challenge: Winter Light

In Central and Northern Europe, a December day can bring as little as seven or eight hours of weak daylight. Most herbs want at least six hours of direct light, so placement matters more than anything else.

South-facing window: the best spot by far. West-facing comes second.
As close to the glass as possible: light drops sharply even half a meter back into the room.
Turn the pots every few days so the plants don't lean and grow lopsided toward the window.
Not enough light? A simple LED grow light is inexpensive and makes a huge difference. Run it 12 to 14 hours a day, about 20 to 30 cm above the plants. Long, thin, pale stems are the sign your herbs need more light.

The Best Herbs to Grow Indoors in Winter

Easy and Forgiving

Chives, parsley, and mint handle lower light better than most and keep producing leaves all winter. Mint grows fast, so give it its own pot.

Mediterranean Herbs

Thyme, oregano, and rosemary like it bright and fairly dry. Rosemary actually prefers a cool, bright room in winter, around 5 to 15°C, such as a stairwell or a cool bedroom window, rather than a warm living room.

Basil

The favorite, but also the fussiest. Basil wants warmth, ideally above 15°C, lots of light, and no cold drafts. Keep it away from windows you open often for airing in winter.

Good to know: annual herbs like basil and coriander slow down in winter no matter what you do. Expect smaller harvests until the days get longer in February.

How to Save Supermarket Herb Pots

Most people start with a pot of basil or parsley from the supermarket, and most of those die within a few weeks. That's not your fault. They are grown to be eaten quickly, with dozens of seedlings crammed into one tiny pot.

1. Divide it. Gently pull the root ball apart into three or four smaller clumps.
2. Repot each clump into its own pot, at least 12 to 15 cm wide, with fresh potting soil and a drainage hole.
3. Water well, then let it settle for a few days out of direct, hot sun.
4. Move it to your brightest window. Within a week or two, each clump should start putting out new leaves.
A bushy potted herb plant on a white saucer

One divided supermarket pot can become three or four healthy plants.

Watering and Humidity

Indoor herbs need less water in winter than in summer because they grow slowly. Overwatering is the most common way to lose them.

  • Push a finger into the soil. Water only when the top 2 to 3 cm feel dry.
  • Always use pots with drainage holes, and empty the saucer after watering.
  • Water in the morning with room-temperature water, not cold tap water.
Watch out for radiators. A pot right above a heater dries out in hours and the hot, dry air stresses the leaves. If your windowsill sits over a radiator, raise the pots on a tray of wet pebbles or move them to the side.

Bringing Garden Herbs Indoors

You can also rescue herbs from your garden or balcony before the hard frosts. Chives, parsley, and thyme move indoors well.

Dig up a small clump with plenty of roots and pot it in fresh potting soil.
Check for pests like aphids under the leaves, and rinse the plant before bringing it in.
Adjust slowly. Leave the pot in a sheltered spot outside for a few days, then move it in.
Chives trick: leave a pot of chives outside until it has had a few frosts, then bring it in. The cold "wakes it up", and it will send up fresh new shoots within a couple of weeks.

Harvesting Without Killing the Plant

Regular harvesting actually keeps herbs bushy, as long as you do it right.

  • Never take more than a third of the plant at once.
  • Cut basil and mint just above a pair of leaves. Two new shoots will grow from that point.
  • Cut chives and parsley from the outside, leaving the young center to keep growing.
  • Pinch off flower buds on basil as soon as they appear to keep the leaves coming.

Quick Indoor Herb Checklist

  1. Brightest window, as close to the glass as possible
  2. Grow light if leaves look pale and stems stretch
  3. Pots with drainage holes, no standing water
  4. Water only when the top soil is dry
  5. Keep away from radiators and cold drafts
  6. Harvest often, but never more than a third

Final Thoughts

A few pots of herbs won't feed a family, but they make winter cooking taste fresh and keep a bit of green life in the house during the darkest months. Start with chives and parsley, give them your brightest window, and go easy on the watering. By the time spring arrives, you can move them back outside, stronger than when they came in.

Continue Reading

Medicinal Herbs at Home: Recipes for Healing Teas & Natural Remedies

What to do with your herbs once they are growing: simple teas and home remedies.

The Best Plants and Flowers to Grow Inside Your Home

Easy houseplants that bring green into every room.

How to Prepare Your Garden for Winter: A Step-by-Step Autumn Checklist

Get your outdoor beds ready for the cold while your herbs move inside.

Love Nature and Gardening? There's Much More Coming

If you are into nature, gardening, and agriculture, keep exploring our articles. We cover everything about it, in Europe and around the world, and there is much more coming soon. Follow our Facebook Page and join the conversation in our Facebook Group.

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