Growing Guides

How to Grow an Indoor Herb Garden This Winter

By Sara JohnsonSunday, December 15, 2024

December in Florida is milder than most of the country, but even here the shorter days and occasional cold snaps make outdoor herb gardening unreliable. Basil sulks below 50°F. Dill bolts at the first sign of stress. And if you are reading this from anywhere north of Orlando, your outdoor herbs are probably done for the season.

The good news is that herbs are among the easiest plants to grow indoors. A sunny windowsill, a decent pot, and some basic attention to watering will keep you in fresh basil, parsley, and chives straight through winter. At Wholly Water Farms, we grow herbs year-round in controlled environments, but you do not need a farm setup to keep a kitchen herb garden going. Here is how to do it right.

What Are the Best Herbs to Grow Indoors During Winter?

Six herbs perform well indoors with minimal fuss: basil, parsley, chives, mint, thyme, and oregano. Each has slightly different needs, and matching the right herb to the right spot in your home makes the difference between a thriving plant and a leggy, yellowing disappointment.

Basil

Basil is the most popular kitchen herb and the most demanding indoor grower. It needs warmth — 70°F or higher at all times — and at least six hours of direct light daily. A south-facing window is ideal. If your window does not deliver six hours of sun in winter, supplement with a small LED grow light positioned 6-12 inches above the plant. Basil will not tolerate cold drafts, so keep it away from windows that leak cold air. Harvest frequently by pinching off the top sets of leaves, which encourages bushy growth rather than tall, spindly stems.

Parsley

Flat-leaf (Italian) parsley adapts to indoor conditions better than most herbs. It tolerates lower light than basil, handles cooler temperatures down to 55°F, and produces steadily for months once established. The catch is germination — parsley seeds are notoriously slow, taking two to three weeks to sprout. If you want parsley by Christmas, buy a small nursery plant rather than starting from seed. Harvest outer stems first, leaving the center growth point intact.

Chives

Chives are the most forgiving indoor herb. They tolerate lower light, cooler temperatures, and inconsistent watering better than almost anything else you can grow in a pot. A north-facing or east-facing window works fine. Cut the hollow leaves with scissors about an inch above the soil line, and they will regrow repeatedly. Chives also produce mild onion-flavored blossoms if you let them flower — edible and attractive on a windowsill.

Mint

Mint grows aggressively. That is both its strength and its warning label. Always grow mint in its own container — never with other herbs, because it will take over the entire pot within weeks. It tolerates partial shade and cooler indoor temperatures, making it one of the easier herbs for a kitchen windowsill. Spearmint and peppermint are the most common indoor varieties. Pinch or cut stems regularly to prevent it from becoming woody.

Thyme

Thyme is a Mediterranean herb, which means it wants excellent drainage, full sun, and less water than you think it needs. Use a pot with a drainage hole (non-negotiable) and a well-draining potting mix with added perlite. Water only when the top inch of soil is completely dry. Overwatering is the number one killer of indoor thyme. A south-facing window is best. English thyme and lemon thyme both do well indoors.

Oregano

Oregano shares thyme's Mediterranean preferences: full sun, well-drained soil, and infrequent watering. It is a compact grower that stays manageable in a six-inch pot. Greek oregano has the strongest flavor for cooking. Like thyme, oregano is more likely to die from too much water than too little. Let it dry out between waterings and give it as much light as you can.

What Containers and Soil Should You Use for Indoor Herbs?

Two rules that solve 80 percent of indoor herb problems: drainage holes and proper potting mix.

Every container needs at least one drainage hole. Herbs sitting in waterlogged soil develop root rot, which shows up as yellowing leaves, wilting despite wet soil, and a musty smell from the pot. Terra cotta pots are excellent because they are porous and wick away excess moisture. Plastic pots work if they have drainage holes. Decorative pots without holes can be used as outer sleeves — put the planted pot inside the decorative one, and remove it to water over a sink.

Use a quality indoor potting mix, not garden soil. Garden soil is too dense for containers. It compacts, holds too much water, and can harbor pests and pathogens. A good indoor potting mix contains peat moss or coconut coir, perlite for drainage, and vermiculite for moisture retention. For Mediterranean herbs like thyme and oregano, add extra perlite — a 50/50 mix of potting soil and perlite works well.

How Much Light Do Indoor Herbs Need in Winter?

Light is the single biggest limiting factor for indoor herbs, especially in winter when days are shortest. Most herbs need six to eight hours of direct sunlight daily. A south-facing window is the best location in the northern hemisphere. West-facing is second best. East-facing gives you morning light, which is gentler but often not enough hours for basil and oregano. North-facing windows rarely provide adequate light for any herb except chives.

If your windows are not cutting it — and you will know because your herbs will grow tall, thin, and pale, reaching toward the light — add a supplemental grow light. A small LED grow light positioned 6-12 inches above the plants and run for 12-14 hours per day will compensate for weak winter sun. These lights cost $20-40 and use minimal electricity. They are the single best investment you can make for a winter herb garden.

How Often Should You Water Indoor Herbs?

Overwatering kills more indoor herbs than underwatering. The instinct to water daily is strong, but most herbs prefer their soil to dry slightly between waterings. Stick your finger into the soil up to the first knuckle. If it feels dry, water. If it feels moist, wait.

Basil and parsley prefer consistently moist (not wet) soil. Thyme, oregano, and rosemary prefer to dry out between waterings. Chives and mint fall in the middle. Water thoroughly when you do water — until it runs out the drainage hole — and then do not water again until the soil tells you to.

The most common sign of overwatering is yellowing lower leaves. The most common sign of underwatering is wilting that recovers quickly after a drink. Leggy, stretched-out growth means not enough light, not a watering problem.

Do Indoor Herb Gardens Make Good Holiday Gifts?

Absolutely, and I am not just saying that because we sell herbs. A potted herb garden is a practical, lasting gift that keeps producing long after the wrapping paper is recycled. Here are a few gift ideas:

  • A trio of terra cotta pots with basil, parsley, and chives — the three most-used kitchen herbs
  • A windowsill planter box with a mix of Mediterranean herbs (thyme, oregano, rosemary) for the cook who makes a lot of Italian food
  • A single large pot of mint with a note about making fresh mint tea all winter
  • A complete kit: pot, potting mix, seeds, and a small grow light for someone who wants to start from scratch

For more detailed growing information on specific herbs, check out our comprehensive herb growing guide. And if you would rather skip the growing and just get fresh herbs, visit us at one of our local farmers markets.

Frequently Asked Questions

Can basil grow indoors during winter?

Yes, but basil is the most demanding indoor herb. It needs temperatures above 70°F, at least six hours of direct light daily, and protection from cold drafts. A south-facing window with supplemental LED lighting works best. Pinch tops regularly to encourage bushy growth and prevent flowering, which turns the leaves bitter.

Why are my indoor herbs growing tall and thin?

Leggy, stretched-out growth is almost always caused by insufficient light. Herbs reaching toward a window are telling you they need more sun. Move them to a south-facing window or add an LED grow light positioned 6-12 inches above the plants and run for 12-14 hours daily. This is the most common indoor herb problem during winter.

How often should I water herbs growing indoors?

Water when the top inch of soil feels dry to the touch. Most herbs prefer to dry slightly between waterings rather than staying constantly wet. Basil and parsley like more consistent moisture, while thyme and oregano prefer to dry out more completely. Always use pots with drainage holes to prevent waterlogged roots.

What is the best potting mix for indoor herbs?

Use a quality indoor potting mix, never garden soil. A good mix contains peat moss or coconut coir, perlite for drainage, and vermiculite for moisture retention. For Mediterranean herbs like thyme and oregano, add extra perlite to improve drainage — a 50/50 ratio of potting mix to perlite works well.

Can I grow herbs in a pot without drainage holes?

Not recommended. Herbs in containers without drainage almost always develop root rot, which shows up as yellowing leaves and wilting despite wet soil. If you want to use a decorative pot without holes, place the herb in a smaller pot with drainage inside the decorative one, and remove it to water over a sink.

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