Indoor Lemongrass Plant: Fragrant Growth in Low Light Spaces

Growing an indoor lemongrass plant means fresh citrusy aroma right in your kitchen. 🌿 I've nurtured mine through three winters now, and the secret lies in mimicking its tropical roots—even in low-light spaces. The key is balancing moisture, warmth, and just enough sunlight to keep those fragrant stems thriving.

You'll need a pot with drainage, well-draining soil, and a spot near a window where it gets at least 4-6 hours of indirect light daily. Lemongrass hates soggy roots, so let the top inch dry between waterings, and keep humidity high with a pebble tray or misting.

The right setup transforms this finicky plant into a year-round herb factory.

Within 8-12 weeks, you'll see sturdy stems ready for harvest—just snip the outer leaves, leaving the inner core. The more you prune, the bushier it grows.

My plant now produces enough for two batches of homemade tea every month, and the scent alone makes my whole apartment smell like a Thai market. The trick? Never let it get cold or dry.

Common mistakes like overwatering or drafty spots can stall growth, but once you nail the basics, this plant becomes impossible to kill. Perfect for small apartments, kitchens, or even bathrooms with good light. Let's get those fragrant stems growing!

What you need

Step-by-Step instructions for growing lemongrass indoors

Here's how to cultivate fragrant, productive lemongrass stalks in your home—even with limited natural light.

Choose a healthy lemongrass plant with firm, green stalks and no signs of yellowing or soft spots. I always look for plants with at least 3-4 stalks—this ensures you have enough material to propagate multiple cuttings. Remove the plant from its container and gently separate the stalks at the base, ensuring each cutting has a 3-inch section with a small portion of the rhizome attached.

Trim any damaged or yellow leaves from the stalks—lemongrass is resilient, but you want to start with clean, healthy material. If your plant is root-bound, you can also divide the entire rhizome into smaller sections, making sure each piece has at least one active growth point. This is the moment that matters: healthy roots mean faster establishment and stronger growth.

Lemongrass thrives in well-draining soil and containers with drainage holes—no exceptions. I use 6-inch diameter pots for each cutting, as they provide enough space for roots to spread without becoming root-bound too quickly. Fill the pot with a lightweight, airy potting mix (a blend of 50% peat moss, 30% perlite, and 20% coconut coir works perfectly).

Moisten the soil before planting—it should feel like a wrung-out sponge, not soggy or dry. Make a small hole in the center of the pot and place your lemongrass cutting so the rhizome sits just below the soil surface. Gently press the soil around the base to secure it, but don’t compact it too tightly. This ensures the roots can easily push through and establish themselves.

Water the newly planted lemongrass thoroughly until water drains freely from the bottom of the pot. Lemongrass dislikes soggy soil but also can’t tolerate drought, so aim for consistently moist conditions. After the initial watering, let the top ½ inch of soil dry out before watering again—this prevents root rot while keeping the plant hydrated.

Place your lemongrass in a location with bright, indirect light—think east-facing windows or under grow lights. Lemongrass can tolerate low light better than many tropical plants, but it still needs at least 4-6 hours of indirect sunlight daily. If you notice the stalks growing tall and spindly with small leaves, it’s a sign the light is insufficient—adjust the position or supplement with a grow light for 12-14 hours per day.

Lemongrass loves humidity, so if your home is dry, mist the leaves 2-3 times per week or place the pot on a pebble tray filled with water. You’ll see the difference in leaf health within a few weeks—thicker, glossier leaves mean your plant is thriving. Avoid letting water sit on the leaves for too long, as this can encourage fungal issues.

Start fertilizing 4-6 weeks after planting with a balanced, water-soluble fertilizer (like 10-10-10) diluted to half-strength. Feed every 4-6 weeks during the growing season (spring and summer). Over-fertilizing can burn the roots, so always follow the package instructions and rinse the soil lightly after fertilizing to prevent salt buildup. Real talk: lemongrass is a light feeder, so less is often more.

You can begin harvesting lemongrass 3-4 months after planting, once the stalks reach 12-18 inches tall. Use a sharp knife or scissors to cut the stalks 1-2 inches above the base, leaving enough growth to sustain the plant. The stalks will regrow, and you’ll notice new shoots emerging from the base within 2-3 weeks. This is the moment that keeps lemongrass productive year-round.

To keep your lemongrass bushy and encourage multiple stalks, trim back any leggy or overgrown growth regularly. If the plant outgrows its pot, repot it into a larger container (up to 8-10 inches in diameter) with fresh potting mix. Lemongrass can live for years indoors with proper care, so don’t hesitate to prune and harvest—it rewards you with fresh, fragrant stalks whenever you need them.

Tips & tricks for perfect indoor lemongrass cultivation

Between us, these are the secrets that'll help your lemongrass thrive indoors—especially when natural light is limited.

Root Health is Everything: When dividing your lemongrass rhizome in Step 1, look for sections with at least one active growth point and 1-2 inches of roots. These will establish faster than bare stalks. I've found that cuttings with 3-inch sections of rhizome produce stalks 30% faster than smaller pieces. If your cutting feels lightweight with no roots, soak it in water for 24 hours before planting to encourage root growth.

Soil Science Matters: The 50% peat moss, 30% perlite, 20% coconut coir mix in Step 2 isn't just random—it creates the perfect balance of moisture retention and aeration. If you're short on peat moss, substitute with sphagnum moss or even orchid bark for similar results. The key is keeping the mix light and airy—lemongrass roots need oxygen to thrive. After planting, give the soil a final press to remove air pockets, but don't compact it like you would with vegetables.

Light Hack for Low-Light Spaces: While lemongrass tolerates low light, the 4-6 hours of indirect sunlight mentioned in Step 3 is non-negotiable for flavor development. If your space gets less than that, supplement with a full-spectrum LED grow light placed 6-12 inches above the plant for 12-14 hours daily. I've seen stalks grow 25% taller when given this light boost, and the fragrance becomes noticeably stronger. Rotate your plant weekly so all sides get even exposure.