Countertop Harvest
By the Countertop Harvest team · Last updated
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We've all been there. Your basil looked great when you brought it home, and three weeks later it's a tall, floppy stem with a few leaves at the top and long bare gaps in between. That's what "leggy" means, and the good news is it's one of the easiest indoor herb problems to fix.
Why indoor herbs get leggy
Nine times out of ten, it's light. When a plant doesn't get enough of it, it puts its energy into growing taller to reach for more. The stems get thin and pale, and the gaps between leaf sets (gardeners call them internodes) get longer. Indoors, even a bright-looking windowsill gives herbs far less light than they'd get outside, and in fall and winter the days are short too.
Two other things make it worse: never harvesting, because an unpinched stem just keeps going up, and warm rooms, which push fast, soft growth that the light can't support.
How to tell it's leggy, not something else
- Long bare stem between leaf pairs, more than you'd expect
- The whole plant leans toward the window
- New leaves are small and pale green
- Stems feel thin and flop over when you water
If leaves are yellowing, wilting or spotted instead, see why is my indoor basil dying? or our indoor herb pest guide.
How to fix leggy herbs, step by step
- Move it closer to light. A south- or west-facing window is the brightest spot in most homes. Even there, winter light is weak, so a grow light is often the real fix.
- Add a grow light on a timer. Run a full-spectrum LED 12–16 hours a day. Keep it close, roughly 6–12 inches above the leaves (check the maker's guidance). If new growth still stretches, lower it; if top leaves bleach or crisp, raise it.
- Cut the stretched stems back. Stretched stems won't shrink. Snip each stem just above a pair of leaves, leaving at least a couple of sets below the cut. Two new shoots grow from that spot, and the plant fills out.
- Keep pinching. Pinch the growing tips every week or two, and pinch off flower buds on basil and mint. Never take more than about a third of the plant at once.
- Cool it down a little. Warm rooms plus low light make stretching worse. A normal room temperature, away from heat vents, helps the plant stay compact.
Which herbs stretch the most
Basil, cilantro and dill stretch fast in low light. Mint and oregano get leggy but bounce back hard after a trim. Rosemary and thyme stretch slowly and turn woody, so cut them back lightly and only into green growth. Chives and parsley grow from the base, so instead of pinching, harvest the outer stems right down near the soil.
The grow light that fixes most of this
You don't need anything fancy. For one to three pots, a clip-on gooseneck LED with a built-in timer works. For a shelf of herbs, a bar or strip light covers more. We break down what to look for in best grow light for indoor herbs and the budget options in grow lights under $50.
Clip-on LED grow light with timer
Full spectrum, adjustable gooseneck, auto on/off
Leggy in a smart garden?
Smart gardens have built-in lights, so stretching there usually means the light hood is set too high for young plants, or plants have been left untrimmed. Lower the hood to the lowest setting your model allows while seedlings are small, raise it gradually as they grow, and start harvesting the tops early. If you're still choosing one, see best smart gardens for small kitchens.
Can you save a really leggy plant?
Usually, yes. Cut it back hard to just above a healthy leaf pair, give it proper light, and it will regrow bushier. Basil and mint cuttings also root easily in a glass of water, so the tops you cut off can become new plants. If a stem is all bare and woody with no leaves left, it's often faster to start fresh. See how to grow basil indoors and how to prune and harvest basil.
Sources
- University of Maryland Extension: Diagnose indoor plant problems
- Our guide: how much light do indoor herbs need?
Frequently asked questions
Why are my indoor herbs leggy?
Almost always not enough light. Herbs stretch toward light when it's too weak, which gives thin stems and long gaps between leaves. Unpinched stems and warm rooms make it worse.
Can leggy basil be fixed?
Yes. Cut each stem back just above a healthy leaf pair, move it under brighter light or a grow light, and pinch the tips regularly. It regrows bushier.
How far should a grow light be from herbs?
Roughly 6–12 inches above the leaves for most small LED lights, but follow the maker's guidance. Lower it if stems stretch; raise it if top leaves bleach.
How many hours of grow light do herbs need?
Run the light 12–16 hours a day on a timer.
Will stretched stems get shorter again?
No. The stretched part stays. You fix legginess by cutting back and growing new, compact shoots under better light.