When to Plant Artichoke 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, November 6, 2025

Transplant Outdoors

Thursday, January 15, 2026

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

Pro tip: Start Artichoke seeds indoors 8 weeks before your last frost date, then transplant outdoors around Thursday, January 15, 2026.

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🌿 Plant Details

Scientific Name Cynara scolymus

Days to Maturity 150 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 8-21 days

Ready to Plant Artichoke in Haiku?

Get your seeds now so they're ready by Thursday, November 6, 2025.

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🛠️ 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

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Allow one head to fully bloom and dry on the plant — the thistle-like flower matures into seeds.

Processing

Let flower head dry completely on the plant, pull apart to find seeds at the base of each feathery strand.

Seed Viability

Up to 5 years when stored cool, dark, and dry.

Pro Tip

Seeds may not grow true to the parent variety — artichokes vary widely from seed. Crown division is more reliable.

Frequently Asked Questions

When should I plant Artichoke in Haiku, Hawaii? +

In Haiku (Zone 12a), start Artichoke seeds indoors around Thursday, November 6, 2025 and transplant outdoors around Thursday, January 15, 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 Artichoke take to grow? +

Artichoke typically matures in about 150 days from transplanting. In Haiku, that means you can expect harvest around Thursday, January 15, 2026 plus 150 days.

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

Artichoke should be started indoors 8 weeks before your last frost date. In Haiku, that means starting around Thursday, November 6, 2025.

📚 More Artichoke Planting Guides

🗺️

Artichoke in Hawaii

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 12a Artichoke Guide

All cities in your zone · Avg dates

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Growing Artichoke in Zone 12a

Artichoke (Cynara scolymus) is a popular garden vegetable. In Haiku, Hawaii, which is in USDA Hardiness Zone 12a, you should start seeds indoors around Thursday, November 6, 2025.

Your average last frost date is Thursday, January 1, 2026. Plan to transplant your Artichoke seedlings outdoors around Thursday, January 15, 2026, about 2 weeks after your last frost date.