Lemongrass is a long thick grass with leaves at the top that add movement and texture to container and in-ground plantings. Plants thrive in moist soil and full sun. The bottom five inches or so is where you ll find the flavor in this citrusy herb. To use remove the leafy top and woody bottom strip the tough outer layers and dice the white inner stalk for Asian-style curries stir fries and marinades. Use discarded parts to infuse a tea broth or soup. Flavor intensifies the longer you cook it. Use lemongrass fresh dry it or freeze it.