Growing Lemongrass in the South: The Tropical Herb That Thrives in Heat

Lemongrass Is One of the Easiest and Most Rewarding Herbs You Can Grow in the South

If you have ever grown lemongrass in the South and been surprised at how fast it explodes into a massive clump, you already know the story. This tropical grass is perfectly adapted to heat, humidity, and the kind of intense summer sun that burns out most plants. It asks for very little and gives back an enormous amount: fresh stalks for cooking, a powerfully fragrant landscape plant, and a natural mosquito deterrent that actually smells wonderful while it works.

Why Lemongrass Loves Southern Growing Conditions

Lemongrass is native to tropical Southeast Asia where conditions are not entirely unlike Florida and the Gulf Coast in summer. Hot temperatures, high rainfall, and intense sun are exactly what this plant evolved for. In zones 9 through 11 it grows as a true perennial and can live for many years without replacement. In zone 8b it will die back to the ground after a hard freeze but regrow from the root mass every spring as long as the crown survives.

The plant forms a large clump of grass like stalks that can reach three to six feet tall and four to five feet wide in a single season in ideal conditions. Once established it is remarkably drought tolerant, heat tolerant, and largely pest free. It is genuinely one of the most low maintenance food plants available to Southern growers.

Where to Plant Lemongrass in Your Garden

Full sun is where lemongrass performs best. It will grow in part shade but stalks will be thinner, less flavorful, and the overall plant will be smaller. Afternoon shade in the hottest part of summer is tolerated but morning sun all day is better.

Lemongrass gets large. Give it space in the landscape, a minimum of three feet from other large plants and structures. It works beautifully as a border plant along a garden edge, as a screen between garden sections, or as an accent in a food forest understory. The bright green clumping grass appearance is genuinely attractive in the landscape.

It grows well in containers if you want to keep it portable for cold protection in zone 8b. A large pot, fifteen gallons or bigger, gives the root system enough room to produce the large productive clumps worth harvesting from.

Planting Lemongrass From Cuttings or Starts

The easiest way to start lemongrass is from a grocery store stalk. Buy a bundle of fresh lemongrass from an Asian grocery or well stocked supermarket, make sure the base has some intact root nodes, and place the stalks in a jar of water in a bright window. Within one to two weeks you will see white roots developing from the base. Plant out when roots are an inch or two long.

Alternatively, buy potted starts from a nursery or garden center. In the South these are available at many local plant nurseries and farm markets in spring. Plant after your last frost date in zone 8b or any time in zones 9 through 11.

Soil and Feeding

Lemongrass is not picky about soil but it performs noticeably better in rich, well drained soil with good organic matter. Amend sandy Florida soils with compost before planting. In clay soils, raised planting ensures good drainage which lemongrass prefers.

Feed two to three times through the growing season with a nitrogen rich fertilizer. Lemongrass is a grass and it responds strongly to nitrogen. Well fed plants produce thicker, more aromatic stalks. In the South it is growing aggressively from April through October and wants consistent feeding during this period.

Harvesting Lemongrass Stalks

You can begin harvesting stalks once the plant is well established and producing clumps at least twelve inches in diameter. Harvest by cutting or twisting stalks from the outside of the clump at the base. Leave the inner growth to continue developing the clump. The edible portion is the lower four to six inches of the stalk where it transitions from white to green. The outer leaves are tough and fibrous but perfect for infusing flavor into soups, teas, and broths.

Fresh lemongrass can be refrigerated for one to two weeks, frozen for months, or dried for long term storage. In the South with a year round growing plant, you may have more fresh lemongrass than you can use. Share it with neighbors, compost the extra stalks, or use the entire cut leaves as fragrant mulch around other plants in your garden.

Cold Protection in Zone 8b and 9a

In zones 10 and 11 cold is generally not an issue. In zones 9a and 8b, protect lemongrass during freezes by mulching the base heavily in fall, banking mulch right up to the crown of the plant. If the tops freeze, cut them back and the roots will push new growth when warm weather returns. In severe freeze events in zone 8b, covering the plant with frost cloth on predicted hard freeze nights can save the crown and avoid losing a multi year old clump.

Lemongrass in the Southern Herb Garden

Lemongrass fits beautifully into the Southern herb garden alongside other tropical herbs that love the heat. If you want to build out a complete Southern herb garden with the varieties that thrive in zones 8b through 11, the Florida Herb Garden guide covers twenty five herbs specifically selected for their performance in Southern heat and humidity. Lemongrass is exactly the kind of plant that belongs in every Southern herb garden and once you grow it you will wonder how you ever cooked without it fresh.