When to Plant Parsley 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 Parsley 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 Petroselinum crispum

Days to Maturity 75 days

Mature Height 12-18"

Spread 12"

Type Leaf

Fruit Size N/A

☀️ Growing Requirements

☀️

Sun

Full Sun to Partial Shade

💧

Water

Regular (keep moist)

↔️

Spacing

12" apart

🌱

Planting Depth

0.25" deep

Seeds typically germinate in 14-28 days

Ready to Plant Parsley in Haiku?

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

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🤝 Good Companions

AsparagusTomatoCornRose

🤝

Full Companion Planting Guide for Parsley

See which plants help Parsley 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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Common Parsley Varieties

Popular cultivars to look for at your local nursery or seed supplier.

Italian Flat-Leaf

open-pollinated

Preferred by chefs for its bold flavor; better for cooking than curly varieties.

Curly Parsley

open-pollinated

Decorative tightly ruffled leaves; mild flavor, popular as a garnish.

Giant Italian

open-pollinated

Large, productive flat-leaf variety with exceptional flavor; vigorous grower.

🌾 Seed Saving Guide

🟡 Moderate

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Parsley is biennial — it flowers in year 2. Harvest seed heads when fully brown and dry.

Processing

Cut seed heads into a bag, allow to fully dry, shake out seeds.

Seed Viability

Up to 2 years when stored cool, dark, and dry.

Pro Tip

Parsley must overwinter to produce seed. In cold climates, mulch heavily or pot and bring indoors through winter.

🪴

Raised Bed Planting Guides

A 4×8 bed fits 32 plants of Parsley. See plant counts, spacing grids, and companion pairings for every bed size →

Frequently Asked Questions

When should I plant Parsley in Haiku, Hawaii? +

In Haiku (Zone 12a), start Parsley 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 Parsley take to grow? +

Parsley typically matures in about 75 days from transplanting. In Haiku, that means you can expect harvest around Thursday, January 15, 2026 plus 75 days.

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

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

📚 More Parsley Planting Guides

🗺️

Parsley in Hawaii

Zone-by-zone breakdown · Full state guide

→ 🌡️

Zone 12a Parsley Guide

All cities in your zone · Avg dates

→

Other Plants for Haiku

Blackberry Blueberry Raspberry Strawberry Basil Chamomile Chives Cilantro Dill Lavender Lemon Balm Marjoram Mint Oregano Rosemary Sage Tarragon Thyme Acorn Squash Artichoke Arugula Asparagus Beefsteak Tomato Beet Bell Pepper Bok Choy Broccoli Brussels Sprout Butternut Squash Cabbage Cantaloupe Carrot Cauliflower Cayenne Pepper Celery Cherry Tomato Chili Pepper Collard Green Common Bean Cucumber Eggplant Endive Fennel Garlic Grape Tomato Green Bean Habanero Pepper Head Lettuce Heirloom Tomato Honeydew Melon Jalapeño Pepper Kale Kohlrabi Leaf Lettuce Leek Lima Bean Mustard Okra Onion Parsnip Pea Poblano Pepper Pole Pea Potato Pumpkin Radicchio Radish Rhubarb Roma Tomato Rutabaga Serrano Pepper Shallot Snap Pea Snow Pea Spaghetti Squash Spinach Squash Sweet Corn Sweet Potato Swiss Chard Tomato Turnip Watermelon Zucchini Sunflower Marigold Zinnia Nasturtium Cosmos Echinacea (Coneflower) Petunia Black-eyed Susan Apple Tree Pear Tree Peach Tree Plum Tree Sweet Cherry Tree Lemon Tree Borage Lemongrass Ginger Stevia Tomatillo Edamame Fava Bean Mâche Mizuna Sorrel Shishito Pepper Banana Pepper Watermelon Radish Napa Cabbage Popcorn Broccoli Raab Catnip Valerian Lemon Verbena Bee Balm Anise Lovage Chervil Summer Savory Dahlia Snapdragon Pansy Sweet Pea Morning Glory Hollyhock Larkspur Bachelor Button Columbine Impatiens Salvia (Annual) Sweet Alyssum Celosia Lupine Verbena Elderberry Grape Vine Red Currant Gooseberry Serviceberry Fig Tree Avocado Tree Persimmon Tree Olive Tree

Growing Parsley in Zone 12a

Parsley (Petroselinum crispum) 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 Parsley seedlings outdoors around Thursday, January 15, 2026, about 2 weeks after your last frost date.