Lemongrass

Lemongrass (Cymbopogon citratus), called khawi in the region, is a dense, arching clump-grass that a grower plants for an honest mix of returns: an aromatic kitchen and tea crop above ground and a fibrous, soil-binding clump below that holds the ground layer together.¹ It is one of the easiest pioneer grasses to establish and one of the hardest to kill.

Where it thrives

Native to southern India and Sri Lanka, it belongs to the warm tropics, and it grows well across the Punjab plains, the Sindh coast and the milder parts of the Pothohar.¹ It wants full sun, at least six hours a day, warmth in the 25-30°C band, and free-draining sandy loam; it sulks in cold and rots in waterlogged ground. Once a clump is established it shrugs off heat and short dry spells, which is why it persists on bunds and bed edges with little attention.

Role in the system

In a syntropic planting lemongrass is a pioneer of the ground and grass layer. Its tight, fibrous root mass grips the soil surface, so a row of clumps stabilises bed edges, swale lips and the shoulders of contour paths against rain wash and foot traffic. Planted as a band it slows surface runoff and traps sediment like a soft, living kerb. The bulk it throws up each season is chop-and-drop biomass: cut the leaf, lay it on the beds, and it becomes aromatic mulch that suppresses weeds and feeds the soil as it breaks down. Its strong lemon scent also makes it a useful edge plant for masking and confusing pests around a guild. Treat it as a fast, hardworking ground-layer pioneer that protects soil and feeds the mulch cycle while your slower shrubs and trees fill in.

Growing it

It is almost always grown by division: split a mature clump into slips, each with roots and a bit of stem base, and plant them out into warm, sunny ground. Space clumps so they knit into a continuous band where you want erosion control, or singly as accent plants. Water through establishment, then ease off. Harvest by cutting whole clumps back hard several times a year, which both gives you stalks and mulch and keeps the plant vigorous. Lift and divide every couple of years before the centre goes woody.

What you get

You get culinary stalks and a steady tea and flavouring crop, a heavy flow of mulch from each cutting, and soil-holding at the ground layer.¹ The leaves yield a citral-rich essential oil with documented antimicrobial and antioxidant activity, opening a small value-added angle for distillers.²³ For a grass that asks only sun and a split clump, that is a generous return.

Sourcing notes

The simplest source is a few slips divided from any healthy existing clump; rooted supermarket stalks will also strike in warm conditions. Plant it as a ground-layer band along bed edges, swales and contour lines where its roots and mulch do the most good, not as a scattered ornamental.

Sources

1. Royal Botanic Gardens, Kew (2024). “Cymbopogon citratus (DC.) Stapf.” Plants of the World Online.
2. Tibenda, J.J. et al. (2022). “Review of phytomedicine, phytochemistry, ethnopharmacology, toxicology, and pharmacological activities of Cymbopogon genus.” Frontiers in Pharmacology.
3. Cortes-Torres, A.G. et al. (2023). “Cymbopogon citratus Essential Oil: Extraction, GC-MS, Phytochemical Analysis, Antioxidant Activity.” Current Issues in Molecular Biology.