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Lemongrass Herb

West Indian · Poaceae

Tender tropical clumping herb grown for its fragrant stalk bases and lemony leaves. Needs heat, moisture, and a long warm season to size up well outdoors. Key facts: 80–100 days to maturity, 8+ hours of sun, 36 " spacing. Container-friendly (minimum 5-gallon pot).

Updated April 19, 2026 · Backed by 4 cited sources
Overview

At a Glance

The essentials first: timing, light, spacing, seed-starting, container fit, and overall size.

Days to maturity
80–100 days
Sun
8+ hours
Full Sun In Warm, Sheltered Conditions
Spacing
36 "
between plants
Seed start
8–10 weeks
before transplant
Container
Yes
5+ gallon pot
Height
3–6 ft
at maturity
Planting window

Zone Planting Guide

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This card updates instantly with viability, frost timing, and any planting notes for your selected zone.

Care

Growing Guide

Everything in one place: seed starting, transplant timing, watering, soil, and structural support.

Seed starting
Germination
Time10–20 days
Optimal temperature78°F
Seed depth0.125"
Moving outdoors
Transplanting
Minimum soil temp65°F
Harden off7 days
Moisture
Watering
Weekly1–2 "
NeedsConsistent
Drip, hand watering, or flood irrigation
Root zone
Soil
pH range5.5–7.5
PreferredMoist, Rich Loam With High Organic Matter And Excellent Drainage
Resilience

Plant Health

Stress tolerance, resistance notes, and the most common problems to watch for as plants mature.

Tolerance
Heat: High Cold: Low Drought: Low

Common Issues

Frost Damage

Cause: Even light frost scorches foliage and stops growth.

Prevention: Transplant well after frost and bring containers in before cold weather.

Thin Stalks

Cause: Too little heat, water, or nutrition during summer.

Prevention: Plant in full sun, irrigate regularly, and feed lightly through summer.

Root Rot

Cause: Poor drainage or standing water around the crown.

Prevention: Use raised beds or containers with free drainage.

Feeding & picking

Nutrition & Harvest

How hungry the plant is, what ripe harvest looks like, and how long the crop keeps after picking.

Feeding
Nutrition
Feeding intensityModerate feeder
RecipesWorm Castings Topdress, Compost Tea
Timing
Harvest

Harvest when stalk bases are thick and aromatic, usually late summer through early fall.

Expected yield0.5–1.5 lbs/plant
Storage10 days — Refrigerate trimmed stalk bases wrapped loosely; freeze chopped stalks for longer storage.
Plant relationships

Companion Planting

Helpful neighbors can support growth or deter pests. Keep antagonistic plants separated to reduce stress and competition.

What you'll need

Growing Supplies

Based on Lemongrass's growth profile -- recommendations matched to this variety's specific requirements.

Drip irrigation / soaker hose kit

Every gardener benefits from putting water at the root zone instead of on the leaves, because drip and soaker systems reduce foliar disease pressure by limiting leaf wetness and soil splash. A quality kit should include a backflow preventer, filter, pressure reducer, and UV-resistant tubing.

Source: Iowa State University Extension; Colorado State University Extension; UMass Extension

Soil test kit

A soil test gives a baseline for pH and nutrient status so gardeners can add only what the soil actually needs. Prioritize a mail-in or lab-affiliated kit whenever possible because extension guidance notes that laboratory testing is more accurate than instant readers.

Source: University of Maryland Extension; Purdue Extension; Montana State University Extension

Quality bypass pruners

Extension guidance favors bypass designs because they make cleaner, closer cuts on living tissue than anvil types. Look for hardened steel blades that can be sharpened, a comfortable grip, and a cutting capacity matched to real home-garden stems.

Source: University of New Hampshire Extension; Iowa State University Extension; Purdue University Extension

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Research

Sources

Reference material and extension guidance used to build this growing guide.

seed_catalog SeedsNowuniversity USU Extensionuniversity Wisconsin Horticultureinference Seed germination figures inferred from Cymbopogon seed culture
Internal links

Lemongrass Herb Planting Dates by Zone

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