The outdoor garden is winding down, the first frosts are rolling across much of the country, and that pot of basil on the patio is looking a little sad. But fresh herbs don't have to disappear until spring. With a sunny window (or a cheap grow light) and a few seed packets, you can keep snipping chives, parsley, and cilantro all winter long.
Mid-to-late October is a great time to start. Seeds sown now will be ready for their first light harvest around the holidays, and they'll keep producing well into next spring.
Which herbs actually thrive indoors in winter?
Not every herb loves life on a windowsill. Short days, cool glass, and dry indoor air favor herbs that are happy with moderate light and cooler temperatures. Here are the four we'd start with:
1. Chives — the easiest win
Chives are about as forgiving as herbs get. They tolerate lower light, don't mind a cool room, and regrow every time you cut them. Sow a pinch of seed thickly across the surface of a pot, cover with about 1/4 inch of mix, and keep it evenly moist. Germination takes 1–2 weeks. Once the grassy clumps reach about 6 inches, snip what you need an inch or two above the soil and they'll push out new growth. Perfect over eggs, baked potatoes, and soups.
2. Parsley — slow to start, worth the wait
Parsley has a reputation for being slow, and it's earned: seeds can take 2–4 weeks to sprout. The trick is to soak the seeds in warm water overnight before sowing to soften the tough seed coat. Flat-leaf Plain Parsley has the stronger flavor for cooking and grows well in a deep pot (parsley has a long taproot, so aim for at least 6–8 inches of depth). Once established, it's a steady producer — harvest the outer stems first and let the center keep growing.
3. Cilantro — finally, a season it likes
If your summer cilantro always bolted to seed before you could use it, winter is your chance. Cilantro prefers cool temperatures, which makes a 60–70°F house close to ideal. Gently crack the round seed husks between your fingers before planting (each "seed" holds two), sow 1/4 inch deep, and expect sprouts in about 7–10 days. Cilantro doesn't transplant well, so sow it right in the pot you'll grow it in. Because each planting has a limited life, start a new small pot every 3–4 weeks for a continuous supply.
4. Basil — only if you have a grow light
We love Sweet Basil, but we'll be honest: it's the diva of the winter windowsill. Basil wants warmth (ideally 70°F or higher) and lots of light, and a cold north window in January will leave you with leggy, pale stems. If you have a spot near a heat source and a grow light, go for it — basil sprouts fast (5–10 days) and you can start pinching leaves in about a month. Pinch off the top set of leaves regularly to keep plants bushy, and pinch any flower buds as soon as they appear.
Want to go further? Oregano and sweet marjoram also do well indoors, and they're a nice choice if you cook a lot of Italian or Greek dishes.
Setting up your indoor herb garden
Light is everything
Winter sun is weak and the days are short. A south-facing window is best; east or west can work for chives and parsley. If your herbs are stretching toward the glass and looking spindly, they need more light. An inexpensive LED grow light placed a few inches above the plants and run for 12–16 hours a day (a simple outlet timer makes this effortless) will make a huge difference, especially for basil and cilantro.
Pick the right pots and soil
- Use containers with drainage holes. Soggy roots are the number-one killer of indoor herbs.
- Fill them with a fresh, light potting mix — not garden soil, which compacts in pots and can bring pests indoors.
- Skip the layer of gravel in the bottom. It doesn't improve drainage; it actually raises the wet zone closer to the roots.
- A 4–6 inch pot works for chives, cilantro, and basil. Give parsley something deeper.
Watch the watering
Indoor plants use less water in winter than you'd think. Water when the top inch of soil feels dry, then let excess drain away — don't leave pots sitting in a full saucer. Forced-air heat dries the air, so grouping pots together or setting them on a tray of pebbles and water (with the pots above the waterline) helps a bit with humidity.
Mind the cold glass
Windowsills can get surprisingly chilly at night. If leaves are touching the window or a draft is hitting them, pull the pots back a few inches on frosty nights.
Feed lightly
Herbs grown for leaves don't need much. A half-strength liquid fertilizer every 3–4 weeks once seedlings have a few sets of true leaves is plenty. Overfeeding can actually dull the flavor.
Harvesting for the long haul
The golden rule: never take more than about a third of the plant at once. Light, frequent harvests keep herbs producing longer than one big haircut. Snip chives from the outside of the clump, take parsley's outer stems, and pinch basil just above a pair of leaves so it branches.
Your winter herb shopping list
For a simple four-pot windowsill garden, grab a packet each of Chives, Plain Parsley, Cilantro, and Sweet Basil. One packet holds far more seed than a windowsill needs, so you'll have plenty left to plant outside in spring.
A few pots of fresh green on a gray January day does a lot for the mood, and it beats paying grocery-store prices for a wilted plastic clamshell of herbs. Happy growing!