GardenPerennial Herb · zones 8–11 · 2 varieties
Lemongrass
Cymbopogon citratus
Poaceae — the same plant family as sweet corn, sorghum, cereal rye, oat and 1 more here. Relatives share pests and diseases, which is why rotation plans group by family.
Lemongrass (Cymbopogon citratus) is a perennial herb for USDA zones 8–11. It wants full sun and pH 5–8.4 soil, with about 1–2 in of water weekly. Watch for spider mites and leaf blight. Below: its full sourced profile from 7 extension sources, plus a planting calendar timed to your frost dates.
Typical dates for zone 6b — set your zone or ZIP for yours. Timing is a guide from the crop's sourced growth stages; confirm with your local frost dates and extension before you sow.
What we will not put a number on
We do not give a feeding rate for this crop, and that is deliberate rather than a gap. The figures published by extension services are pounds of nitrogen per acre for a production field — they do not convert safely to a raised bed or a pot without knowing your soil test and your fertilizer's analysis, and guessing errs toward burning roots. It is also why every chart you find online disagrees with the next one.
We give watering as a depth per week rather than gallons per plant, because that is how it is actually measured and how the published figures are written. A gallons-per-plant number depends on your spacing, your soil and whether the plant is in a pot — so it would look more precise than it is.
Site & soil
- Hardiness zones
- 8–11
- This is where lemongrass survives the winter outdoors. Colder than zone 8 it is grown as an annual, or lifted into a pot and kept indoors until spring.
- Sun
- Full sun
- Soil pH
- 5–8.4
- Soil texture
- Loam, Well drained
- Frost tolerance
- Tender
No published figure for the temperature frost starts to hurt it, the temperature that would kill it and a cold-night limit. We looked — where a number is missing here it is missing from the research, not skipped. The crop’s frost and heat tolerance above still applies.
The plant
- Mature height
- 2–6 ft
- Mature spread
- 2–4 ft
- Growth rate
- Moderateest
- Spacing in row
- 24–36 in
- Between rows
- 24–36 inest
- Planting depth
- 1–2 inest
- Container size
- 5–7 gal — low end is the minimum, high end is betterest
- Support
- Self-supportingest
- Grown from
- Division, Cutting, Transplant, Seed
Water & feeding
- Water needs
- Moderate
- Water per week
- 1–2 in/wkest
- Critical water
- Establishment, Vegetativeest
- Feeding
- Moderate
Timing & fruiting
- Harvest cues
- Stem reached harvest size
Edible parts per source: stem, leaf.
Compiled from the extensions cited below. Which ones actually show up depends on your region — your extension's local list is the last word.
Different parts differ — the edible part is the stem and leaf; the notes below flag other parts or preparations.
Petsdogs, cats, horses
Recorded exactly as the source states it — not medical or veterinary advice. If a person or animal may have eaten a toxic part, call Poison Control (1-800-222-1222) or your vet / the ASPCA line (888-426-4435).
| Variety | Type | Habit | Days | What it is known for |
|---|---|---|---|---|
| East Indian Heirloom | East Indian Oil | — | SymbiOp Garden Shop describes this ashappy in a pot | |
| West Indian Heirloom | West Indian Culinary | Upright | — | NC State Extension records this ashappy in a pot · takes the heat |
- ASPCA Animal Poison Control Center
- NC State Extension
- Penn State PlantVillage
- Texas A&M AgriLife Extension (Henderson County Master Gardeners)
- University of Florida IFAS Extension (Gardening Solutions)
- University of Florida IFAS Extension (Nassau County)
- Utah State University Extension
We compile bare facts from these university-extension and horticultural sources, never copied prose. 12 of the 19 values on this page carry a citation. The rest are marked est; hover one and it says why — either nobody publishes a figure we could point at, or a person set it and attached no source. Figures vary with climate and seed source; confirm with your local extension before you buy.
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