When to Plant Head Lettuce in Agate, North Dakota (58310)

Location

Agate, North Dakota

ZIP Code

58310

USDA Zone

Last Frost

Wednesday, May 20, 2026

📅 Your 2026 Planting Dates

Direct Sow Outdoors

Wednesday, April 22, 2026

Based on last frost Wednesday, May 20, 2026 · Zone 3b

Pro tip: Sow Head Lettuce directly outdoors 4 weeks before your last frost date.

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🌿 Plant Details

Scientific Name Lactuca sativa

Days to Maturity 70 days

☀️ Growing Requirements

☀️

Sun

Full Sun

💧

Water

Regular

Seeds typically germinate in 1-7 days

Ready to Plant Head Lettuce in Agate?

Get your seeds now so they're ready by Wednesday, April 22, 2026.

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🛠️ Supplies You'll Need

🪵 Raised Garden Bed 🌍 Vegetable Garden Soil 🛠️ Hand Trowel Set 🚿 Watering Can

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Common Head Lettuce Varieties

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

Buttercrunch

butterhead 65d

Award-winning butterhead with tender, creamy inner leaves and exceptional flavor.

Iceberg

crisphead 75d

Classic crunchy head lettuce with pale, mild leaves; very heat-sensitive, best in cool weather.

Romaine (Paris Island Cos)

romaine 70d

Upright romaine with crisp ribs and dark green outer leaves; the Caesar salad standard.

Little Gem

mini-romaine 60d

Miniature romaine-butterhead cross; perfect for small gardens with dense, sweet heads.

🌾 Seed Saving Guide

🟢 Easy

✅ Open-pollinated — seeds grow true to parent

When to Harvest Seed

Let heads bolt — cut an X in the head to encourage the seed stalk to push through.

Processing

Harvest seed heads as they brown, dry 1 week, thresh gently to release seeds.

Seed Viability

Up to 3 years when stored cool, dark, and dry.

Pro Tip

Lettuce is self-pollinating but can occasionally cross — bag individual plants for perfectly pure seed.

Frequently Asked Questions

When should I plant Head Lettuce in Agate, North Dakota? +

In Agate (Zone 3b), direct sow Head Lettuce outdoors around Wednesday, April 22, 2026.

What is the last frost date for Agate, North Dakota? +

The average last spring frost date for Agate, North Dakota (ZIP 58310) is around Wednesday, May 20, 2026. This is based on NOAA climate normals for USDA Zone 3b.

How long does Head Lettuce take to grow? +

Head Lettuce typically matures in about 70 days from direct sowing. In Agate, that means you can expect harvest around Wednesday, April 22, 2026 plus 70 days.

Should I start Head Lettuce indoors or direct sow in North Dakota? +

Head Lettuce does best when direct sown outdoors. In Agate, sow directly around Wednesday, April 22, 2026.

📚 More Head Lettuce Planting Guides

🗺️

Head Lettuce in North Dakota

Zone-by-zone breakdown · Full state guide

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Zone 3b Head Lettuce Guide

All cities in your zone · Avg dates

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Growing Head Lettuce in Zone 3b

Head Lettuce (Lactuca sativa) is a popular garden vegetable. In Agate, North Dakota, which is in USDA Hardiness Zone 3b, you should direct sow seeds around Wednesday, April 22, 2026.

Your average last frost date is Wednesday, May 20, 2026. Head Lettuce grows well when direct sown, as it doesn't transplant well or germinates quickly outdoors.