When to Plant Lemongrass in Haiku, Hawaii (96708)

Location

Haiku, Hawaii

ZIP Code

96708

USDA Zone

12a

Last Frost

Thursday, January 1, 2026

📅 Your 2026 Planting Dates

Start Seeds Indoors

Thursday, October 23, 2025

Transplant Outdoors

Thursday, January 29, 2026

Based on last frost Thursday, January 1, 2026 · Zone 12a

Pro tip: Start Lemongrass seeds indoors 10 weeks before your last frost date, then transplant outdoors around Thursday, January 29, 2026.

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🌿 Plant Details

Scientific Name Cymbopogon citratus

Days to Maturity 100 days

Mature Height 36-60"

Spread 36"

Type Tropical Perennial

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Moderate-High (1-2 inches/week)

↔️

Spacing

24" apart

🌱

Planting Depth

0.5" deep

Seeds typically germinate in 10-21 days

Ready to Plant Lemongrass in Haiku?

Get your seeds now so they're ready by Thursday, October 23, 2025.

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🤝 Good Companions

TomatoBasilPepper

🤝

Full Companion Planting Guide for Lemongrass

See which plants help Lemongrass thrive, which to keep away, and raised bed layout tips →

🛠️ Supplies You'll Need

🌱 Seed Starting Trays 🪴 Seed Starting Mix 💡 Grow Lights 🌡️ Heat Mat 🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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🌾 Seed Saving Guide

🪴 Vegetative propagation

Propagate vegetatively, not by seed

Lemongrass rarely flowers in temperate climates. Propagate by dividing clumps in spring.

Division is the standard propagation method — separate outer stalks with roots attached and replant.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 8 plants of Lemongrass. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Lemongrass in Haiku, Hawaii? +

In Haiku (Zone 12a), start Lemongrass seeds indoors around Thursday, October 23, 2025 and transplant outdoors around Thursday, January 29, 2026.

What is the last frost date for Haiku, Hawaii? +

The average last spring frost date for Haiku, Hawaii (ZIP 96708) is around Thursday, January 1, 2026. This is based on NOAA climate normals for USDA Zone 12a.

How long does Lemongrass take to grow? +

Lemongrass typically matures in about 100 days from transplanting. In Haiku, that means you can expect harvest around Thursday, January 29, 2026 plus 100 days.

Should I start Lemongrass indoors or direct sow in Hawaii? +

Lemongrass should be started indoors 10 weeks before your last frost date. In Haiku, that means starting around Thursday, October 23, 2025.

📚 More Lemongrass Planting Guides

🗺️

Lemongrass in Hawaii

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 12a Lemongrass Guide

All cities in your zone · Avg dates

→

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Growing Lemongrass in Zone 12a

Lemongrass (Cymbopogon citratus) is a popular garden vegetable. In Haiku, Hawaii, which is in USDA Hardiness Zone 12a, you should start seeds indoors around Thursday, October 23, 2025.

Your average last frost date is Thursday, January 1, 2026. Plan to transplant your Lemongrass seedlings outdoors around Thursday, January 29, 2026, about 4 weeks after your last frost date.