Growing Lemongrass at Home: A Complete Guide
Lemongrass (Cymbopogon citratus) is a versatile tropical herb prized for its citrusy flavor in cooking, teas, and natural repellents. As a home economics expert, I recommend growing it yourself for fresh, cost-effective harvests year-round, whether in pots, gardens, or indoors. This guide draws on proven methods for success.
Ideal Conditions for Lemongrass
Lemongrass thrives in full sun with at least 6 hours of direct sunlight daily and temperatures above 55°F (13°C), ideally 68–77°F (20–25°C) for optimal growth.[1][2] In cooler climates, use container gardening to move it indoors during winter, protecting it from frost.[3] Select well-draining soil like sandy loam, fertile loams, or peat-free multi-purpose compost mixed with organic matter to prevent soggy roots.[1][2][4]
Starting Lemongrass: Seeds, Stalks, or Plants
The easiest method for beginners is propagating from supermarket stalks, which root quickly without needing seeds. Alternatively, start from seeds or buy young plants in spring.
From Supermarket Stalks
- Select fresh stalks with intact bases; trim woody bottoms, papery tops, and any brown leaves to expose fresh growth.[3][4][7]
- Place upright in a jar with 2–3 inches of tepid water on a sunny windowsill. Change water every 1–2 days to prevent cloudiness.[3][4][7]
- Roots and new leaves emerge in 1–3 weeks. Transplant into pots once roots are 2–3 inches long.[3][4][6][7]
From Seeds
- In early spring, sow thinly on moist, sterile potting mix (1/8 inch deep or surface-sprinkled). Cover lightly with fine compost if needed.[1][2][3]
- Keep at 68–77°F in a propagator or warm spot; germination takes 2–3 weeks. Maintain slight moisture and good light.[1][2][3]
- Prick out seedlings at 3 inches tall into larger pots, harden off, and transplant outdoors after frost risk.[1][2]
To ensure healthy propagation, just as you would clean greenhouse glass for maximum light penetration, position your rooting jars in the brightest spot available.
Planting and Spacing
For pots, choose containers slightly larger than the root ball, filled with peat-free compost. Plant at the same depth as before, firm soil, and water well. Place in warm, sheltered sun.[2][3] In-ground, select full-sun sites with free-draining soil; space plants 12–30 inches apart. Incorporate well-rotted organics if soil is poor.[2][6] Top-dress pots with compost or worm castings every few weeks for nutrients.[4]
Care and Maintenance
Water consistently to keep soil moist but not waterlogged—lemongrass loves moisture yet tolerates some dry spells in fertile soil. Reduce watering in winter, keeping it just moist indoors.[3][5][6] Fertilize sparingly with slow-release options at planting; avoid excess to prevent legginess.[5]
Harvest outer stalks as needed, starting when plants reach 12 inches. Divide clumps in spring: tip out, cut into sections with roots and stems, and replant.[2][6] Like mulch around trees to retain moisture and suppress weeds, apply organic mulch around lemongrass bases for similar benefits.
For overwintering, bring pots indoors to a sunny, warm spot. Treat it as a perennial in pots, harvesting regularly to prevent overcrowding.[3][6] Pair indoor care by remembering to water indoor succulents alongside your lemongrass for a thriving houseplant routine.
Common Issues and Troubleshooting
- Yellowing leaves: Often overwatering or poor drainage—ensure pots have holes and use well-draining mix.[1]
- Leggy growth: Insufficient light—move to full sun.[5]
- Pests: Watch for aphids; rinse with water or use neem oil.
- No roots from stalks: Use fresh stalks and maintain warmth.
With these steps, expect abundant harvests for culinary uses, from soups to pest-repelling sprays. Lemongrass rewards patient growers with vigorous, clump-forming growth.
More tips in the section Garden & Houseplants Care