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Growing N22 in Zone 4a

Oryza sativa

✓ Well Suited for Zone 4a

Score: 90/100

🌡️ USDA Hardiness Zone 4a

Cold Continental

USDA 2023 Verified

Growing Season

110-140 days

Winter Minimum

-30°F to -25°F

(-34.4°C to -31.7°C)

Last Spring Frost

May 10

50% probability

First Fall Frost

October 2

50% probability

AHS Heat Zone 2-5

1 to 7 heat days per year • Very Low heat stress

Typical regions: Northern Midwest, Northern New England, Mountain West, Duluth MN

📊 Data Source:

USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00014922 • Last verified: 1/22/2026

✓ Zone Compatibility Analysis

high confidence

Good match: 120 days to maturity fits 140-day season with 20 days buffer.

Recommendation: Start seeds indoors for best results. Can also direct sow after last frost.

💾 Suitability computed by Solara Agricultural Intelligence Platform

📅 Zone 4a Planting Calendar for N22

Based on NOAA climate normals for Zone 4a. Dates show 50% probability (average year).

🌱 Start Seeds Indoors

March 12

✓ Database-computed optimal date

🪴 Transplant Outdoors

April 30

✓ Database-computed optimal date

🌾 Direct Sow (Alternative)

2 weeks after May 10

For warm-season crops

🥕 Expected Harvest

August 28

Complete before October 2

💡 Zone 4a Growing Tips

• Growing season: 110-140 frost-free days
• Excellent match for this zone - both direct sowing and transplanting work well
• Monitor soil temperature before transplanting (minimum 55-60°F for most crops)

⚠️ Zone 4a Challenges

⚠️Cold winters

⚠️Late spring frosts

⚠️Early fall frosts

✅ Best Plants for Zone 4a

✓Most vegetables

✓Hardy fruit trees

✓Perennial flowers

✓Shade trees

❄️ Winter in Zone 4a

Cold winters with lows reaching -25°F to -30°F.

☀️ Summer in Zone 4a

Warm summers with good growing conditions for most crops.

🔥 Heat Management for AHS Zone 2-5

This zone experiences 1 to 7 heat days per year with very low heat stress.

🌡️Minimal heat protection

🌡️Focus on cold hardiness

Source: American Horticultural Society

📊 N22 Quick Facts

Days to Maturity

90-150

Difficulty

—

Season

—

Type

📍 View N22 Guide for Other Zones

Zone 1a Zone 1b Zone 2a Zone 2b Zone 3a Zone 3b Zone 4a Zone 4b Zone 5a Zone 5b Zone 6a Zone 6b Zone 7a Zone 7b Zone 8a Zone 8b Zone 9a Zone 9b Zone 10a Zone 10b Zone 11a Zone 11b Zone 12a Zone 12b Zone 13a Zone 13b

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