Lemon grass (Cymbopogon citratus) is a lemon-scented herb that is often used in Asian cooking. In appearance, it somewhat resembles the celery plant, but is not difficult to distinguish because of its zesty lemon flavor. The lemon grass is considered a simple plant to grow. Once established, it spreads by its root system like a bamboo.
Remove dry leaves from fresh lemon grass purchased from a supermarket or Asian grocery store. Make sure the stalk is green and firm, and not too dry or overly wet. Peel away all outer leaves that have become dry, then use a knife to cut a couple of inches from the top.
Place the lemon grass in water and set it in a sunny location. Fill a small jar with water and put the lemongrass near a window for three to 10 days or until the roots become visible.
Transfer the lemon grass into a container. Once the roots have appeared and are established, the lemongrass is ready to plant. Place it into a container that has good drainage holes and use a rich potting soil to cover the roots and stalk up to the plant's base.
Return the newly-potted plant to its location. Keep the soil moist, but do not let it become over saturated.