When to Plant Olive Tree in Honolulu, Hawaii (96821)

Location

Honolulu, Hawaii

ZIP Code

96821

USDA Zone

12b

Last Frost

Thursday, January 1, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Thursday, January 15, 2026

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

Pro tip: Sow Olive Tree directly outdoors 2 weeks after your last frost date — it needs warm soil.

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🌿 Plant Details

Scientific Name Olea europaea

Days to Maturity 1825 days

Mature Height 120-300"

Spread 180"

☀️ Growing Requirements

☀️

Sun

Full Sun (6-8 hours)

💧

Water

Low (drought tolerant)

↔️

Spacing

240" apart

🌱

Planting Depth

6" deep

Seeds typically germinate in 30-60 days

Ready to Plant Olive Tree in Honolulu?

Get your seeds now so they're ready by Thursday, January 15, 2026.

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🤝 Good Companions

LavenderRosemaryThyme

🤝

Full Companion Planting Guide for Olive Tree

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

🛠️ Supplies You'll Need

🌿 Fruit Tree Fertilizer 🕸️ Garden Netting 🚿 Watering Can

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🌾 Seed Saving Guide

🔴 Difficult

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Extract seed from fully ripe (black) olives in fall.

Processing

Remove flesh, scarify seed coat with sandpaper, soak 24 hours, then cold-stratify 2 months before planting.

Seed Viability

Up to 1 year when stored cool, dark, and dry.

Pro Tip

Seed-grown olives take 10+ years to fruit and may not match parent. Semi-hardwood cuttings are a much better method.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 0 plants of Olive Tree. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Olive Tree in Honolulu, Hawaii? +

In Honolulu (Zone 12b), direct sow Olive Tree outdoors around Thursday, January 15, 2026.

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

The average last spring frost date for Honolulu, Hawaii (ZIP 96821) is around Thursday, January 1, 2026. This is based on NOAA climate normals for USDA Zone 12b.

How long does Olive Tree take to grow? +

Olive Tree typically matures in about 1825 days from direct sowing. In Honolulu, that means you can expect harvest around Thursday, January 15, 2026 plus 1825 days.

Should I start Olive Tree indoors or direct sow in Hawaii? +

Olive Tree does best when direct sown outdoors. In Honolulu, sow directly around Thursday, January 15, 2026.

📚 More Olive Tree Planting Guides

🗺️

Olive Tree in Hawaii

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 12b Olive Tree Guide

All cities in your zone · Avg dates

→

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Growing Olive Tree in Zone 12b

Olive Tree (Olea europaea) is a popular garden vegetable. In Honolulu, Hawaii, which is in USDA Hardiness Zone 12b, you should direct sow seeds around Thursday, January 15, 2026.

Your average last frost date is Thursday, January 1, 2026. Olive Tree grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.