Feature. Lemongrass is a clumped and tall perennial grass with green and linear leaf lamina, that is long, glaucous, non-articulate, and narrowed at both ends. Mature size. Lemongrass can grow at 2 to 4 ft tall, with a width of 2 to 3 ft. It thrives in10 and 11(USDA). Easy to grow. Lemongrass is very easy to grow and maintain both indoors and outdoors. It grows relatively fast indoors and outdoors, potentially reaching several feet tall in one season. Germination. Press the seeds lightly into a potting mix, and keep moist until germination, which occurs usually within about 10 to 14 days. Use. Not only the long, slender gray-green foliage adds gorgeous color in autumn gardens when it turns burgundy and red, but also it does well in soups, marinades, salad dressings, and stir-frys! Cymbopogon, also known as lemongrass, barbed wire grass, silky heads, Cochin grass, Malabar grass, oily heads, and citronella grass. For gardeners looking to get the most bang for their buck, certain edible landscaping plants, such as lemongrass, can fulfill two desires. This ornamental grass increases curb appeal and offers tasty fresh herbs for the kitchen. Fast-growing lemongrass is as handsome waving in the summer breeze as it is appetizing in your soups, stir-fries, and teas. Native to Sri Lanka and India, just like the crossandra, lemongrass is perennial in zones 10 and 11 but is often grown as an annual in other regions. The long, slender gray-green foliage adds gorgeous color in autumn gardens when it turns burgundy and red. Lemongrass is best planted from potted nursery starts in spring, after all danger of frost has passed. Press the seeds lightly into a potting mix, and keep moist until germination, which occurs usually within about 10 to 14 days. When plants are about 3 inches tall, thin them to a foot apart. Keep indoor pots in a sunny spot.