Lemongrass

Start lemongrass from nursery plants or by rooting store-bought stalks. To root grocery store lemongrass, place fresh stalks with intact bases in a glass of water on a sunny windowsill. Roots develop in 2-3 weeks, after which you can pot up the rooted stalks. Plant outdoors after all danger of frost has passed and nighttime temperatures stay above 50°F.

Lemongrass thrives in rich, moist, well-drained soil with a pH of 6.0-7.0 and full sun. Space plants 24-36 inches apart, as each clump can grow 3-5 feet tall and 3 feet wide in a single season. Work in generous amounts of compost before planting and provide consistent moisture throughout the growing season. Lemongrass is a heavy feeder that benefits from monthly applications of balanced fertilizer.

In zones below 9, grow lemongrass in large containers (at least 5 gallons) that can be moved indoors before the first frost. Overwinter in a bright, cool location, reducing watering but never letting the soil dry completely. Cut back to 6 inches before moving indoors. In spring, divide large clumps and repot with fresh soil. Lemongrass grows rapidly in warm conditions and can reach full size in a single growing season.

Lemongrass (Cymbopogon citratus) is a tropical perennial grass native to the maritime regions of South and Southeast Asia, particularly southern India, Sri Lanka, and the Malay Peninsula. Archaeological and ethnobotanical evidence suggests that humans have cultivated and used lemongrass for thousands of years, with references appearing in ancient Indian Ayurvedic texts dating back more than three millennia. In traditional medicine systems across Asia, lemongrass was valued for its digestive, antipyretic, and calming properties, brewed into teas and decoctions to treat a range of ailments from stomach cramps to fever. Portuguese and Dutch traders encountered lemongrass during the spice trade era and helped spread its cultivation to Africa, South America, and the Caribbean, where it quickly naturalized in tropical lowlands. By the 19th century, commercial distillation of lemongrass essential oil had begun in Kerala, India, and the oil became a cornerstone of the perfume and soap industries. In the culinary world, lemongrass rose to global prominence in the 20th century as Southeast Asian cuisines, especially Thai, Vietnamese, and Indonesian, gained international popularity. Its fresh, citrusy flavor became indispensable in dishes like tom yum soup, rendang, and Vietnamese pho variations. Today lemongrass is cultivated commercially in India, Guatemala, China, Brazil, and across Southeast Asia, with India remaining the largest producer of lemongrass essential oil. Home gardeners in temperate climates have embraced lemongrass as an ornamental and culinary plant, growing it in containers that can be brought indoors during winter months.

Lemongrass is a heavy feeder that thrives in rich, moist, well-drained soil with a pH of 6.0-7.0. Amend planting beds with 3-4 inches of compost and add a balanced slow-release fertilizer at planting time. Feed monthly during the growing season with a nitrogen-rich fertilizer or compost tea to support its vigorous growth. In containers, use premium potting mix and fertilize every 2-3 weeks during active growth. Ensure consistent moisture, as lemongrass is a tropical plant that dislikes dry conditions.

Harvest lemongrass stalks once they reach at least 1/2 inch thick at the base, typically 3-4 months after planting. Cut or twist stalks at ground level, removing them from the outside of the clump. Peel away the tough outer layers to reach the tender, pale inner core used in cooking. Leave at least 5-6 stalks per clump to sustain the plant. The leaves can also be harvested for tea and flavoring soups. Lemongrass produces continuously through the warm season and can be harvested repeatedly.

Fresh lemongrass stalks keep for 2-3 weeks in the refrigerator, wrapped in damp paper towels in a sealed bag. For longer storage, freeze whole stalks in freezer bags; they can be sliced while still frozen and retain excellent flavor. Lemongrass can also be thinly sliced and dried in a dehydrator at 100°F for tea and seasoning blends. Dried leaves make an aromatic herbal tea. Lemongrass paste, made by blending fresh stalks with a splash of oil, freezes well in ice cube trays for convenient cooking use.

Lemongrass is a cornerstone of Thai, Vietnamese, and Indonesian cooking, essential in tom yum soup, curries, and satay marinades. The tender inner core of the stalk is sliced or pounded for pastes, while whole bruised stalks infuse soups and broths. Lemongrass pairs beautifully with coconut milk, ginger, garlic, chili, and fish sauce. The dried leaves make a soothing citrus-flavored tea. Beyond cooking, lemongrass oil is used as a natural mosquito repellent and in aromatherapy for its calming, uplifting scent.