What Is the Water Range on Lemongrass?

Life Zone

• The annual water range for lemongrass in its natural life zone is between 0.7 and 4.1 meters, according to Purdue University. This water range translates into an annual precipitation between approximately 28 and 161 inches. In addition to plentiful rainfall, lemongrass that grows natively in India receives an abundance of humidity. Other countries with similar growing conditions, such as South America, China and Sri Lanka, provide optimal amounts of natural precipitation for cultivating this ornamental grass.

Water Requirements

• Lemongrass that grows indoors as a houseplant or outside in moderate to dry climates requires supplemental watering to maintain suitable levels of moisture. Water frequently and deeply enough to keep the soil near the level of the lemongrass roots evenly moist at all times. You can help recreate the natural humidity these plants prefer by lightly misting the leaves every few days. Regular watering and fertilization, especially between the months of June and September, will help encourage your lemongrass to grow and flourish.

Soil Considerations

• Rich, loamy soil is the best medium for growing lemongrass plants. Sandy soils tend to lose moisture rapidly, while heavy clay soils can become waterlogged. Check for soil moisture beneath the surface by pressing a finger halfway into the soil near the base of your lemongrass plants. The soil at this level should feel slightly cool and damp, rather than soggy or dry. Placing a layer of mulch around the base of your lemongrass will help hold in soil moisture and reduce the need for supplemental watering.

Propagation

• Water provides a key element in propagating new lemongrass plants. Grow new lemongrass plants by inserting the base of cut lemongrass stalks into a glass of water. New roots should appear within about two weeks, at which time you can transplant the young start into a pot of rich, loamy potting soil.