Light. Needs full sun. In low light it makes fewer stalks.
Water. Keep the soil moist but never waterlogged. Water by hand at the base rather than with sprinklers.
Soil and feeding. Prefers rich, well-drained soil; work 2–4 inches of compost into the bed before planting. Feed plants in the ground monthly from June through September with a balanced fertilizer.
Size. Grows to about 5 ft and 3–4 ft wide, and can reach 6 ft. Space plants about 3 ft apart.
Pruning. Harvest older stalks first, once they are about ½ inch thick, cutting at ground level. Divide old clumps to keep them productive.
Problems to watch. Generally free of pests and diseases. For spider mites, hose them off with a strong jet of water or spray Insecticidal Soap.
Good to know. Leaves stay green most of the year and turn red in fall and winter. The stalks flavor Thai-style soups and curries.
Sources: UF/IFAS Gardening Solutions: Lemongrass · UF/IFAS Extension Nassau County: Lemongrass, Cymbopogon citratus · NC State Extension Plant Toolbox: Cymbopogon citratus
