Lemongrass - Herb Seeds

Start lemongrass indoors about 8–10 weeks before the expected last spring frost. Because it thrives in warm weather, wait until both the soil and nighttime temperatures have warmed before moving plants outdoors.

Transplant after all danger of frost has passed. In colder climates, container-grown plants can be brought indoors before the first fall frost and grown through winter in a bright location.

Sow seeds on the surface of moist seed-starting mix and cover only lightly, as light helps encourage germination. Keep the soil consistently warm and evenly moist until seedlings emerge, which usually takes one to three weeks.

Provide strong light after germination and transplant seedlings into individual pots as they grow. Harden plants gradually before moving them outdoors. Space plants about 18–24 inches apart in garden beds or grow them in large containers with excellent drainage.

Choose a site with full sun and fertile, well-drained soil. Lemongrass grows most vigorously with warm temperatures, regular watering, and steady nutrients throughout the growing season.

Water deeply during dry periods but avoid waterlogged soil. A layer of mulch helps conserve moisture and suppress weeds while keeping the roots cool.

Lemongrass grows well alongside peppers, tomatoes, eggplant, basil, and other warm-season crops that enjoy similar growing conditions. Its flowers, when produced in suitable climates, attract pollinators, while the tall foliage also provides texture and height in mixed herb and vegetable gardens.

Harvest lemongrass once stalks reach about ½ inch thick near the base. Cut individual stalks at ground level, removing the tough outer leaves before using the tender inner portion.

Leaves may also be harvested for tea or broth, though they are usually removed before serving because of their coarse texture. Regular harvesting encourages fresh new growth throughout the growing season.

Lemongrass contains fragrant essential oils, including citral, which gives the plant its fresh citrus aroma and flavor. It also provides small amounts of vitamins, minerals, and naturally occurring plant compounds.

The tender stalks are widely used in soups, curries, stir-fries, marinades, sauces, rice dishes, and herbal teas. The leaves can be steeped for tea or used to flavor broths, syrups, and infused beverages. Beyond the kitchen, lemongrass is also appreciated for its fragrance in dried arrangements, potpourri, and homemade household projects.

Lemongrass is generally a resilient herb with relatively few serious pest problems. Aphids, spider mites, and grasshoppers may occasionally feed on the foliage, particularly during periods of plant stress.

Good airflow, well-drained soil, and watering at the base of the plant help reduce fungal diseases and leaf spotting. Remove damaged leaves as needed and avoid allowing the crown to remain constantly wet.

Lemongrass rarely flowers or produces mature seed outside tropical and subtropical climates. Where flowering does occur, plants are insect-pollinated and may cross with other lemongrass plants growing nearby.

Allow flower heads to mature fully before harvesting seed. Dry the heads thoroughly under cover, then gently separate the seed and remove any chaff before storing it in a labeled container in a cool, dry, dark place.

Most gardeners maintain lemongrass by dividing established clumps in spring rather than saving seed. Division produces plants identical to the parent and is the simplest way to expand an existing planting.

• Wait for warm weather before planting outdoors.
• Grow in large containers where winters are cold.
• Harvest outer stalks first, allowing the center to continue growing.
• Divide mature clumps every few years to maintain vigor.
• Bring container plants indoors before the first hard frost.