⚠️
Growing Evergreen Hardy White in Zone 1a
Allium cepa
⚠️ Challenging for Zone 1a
Score: 10/100
🌡️ USDA Hardiness Zone 1a
Extreme Arctic
USDA 2023 Verified
Growing Season
0-50 days
Winter Minimum
-60°F to -55°F
(-51.1°C to -48.3°C)
AHS Heat Zone 1-1
Less than 1 heat day per year • Minimal heat stress
Typical regions: Interior Alaska, Northern Alaska
📊 Data Source:
USDA Plant Hardiness Zone Map 2023 • Last verified: 1/22/2026
⚠️ Zone Compatibility Analysis
high confidencePoor match: Requires 70 days but zone only has 50 frost-free days (20 days short).
Recommendation: Not recommended without greenhouse. Choose varieties maturing in 36 days or less.
💾 Suitability computed by Solara Agricultural Intelligence Platform
📅 Zone 1a Planting Calendar for Evergreen Hardy White
🌱 Start Seeds Indoors
March 12
✓ Database-computed optimal date
🪴 Transplant Outdoors
April 30
✓ Database-computed optimal date
🌾 Direct Sow (Alternative)
2 weeks after last frost
For warm-season crops
🥕 Expected Harvest
July 9
💡 Zone 1a Growing Tips
- • Growing season: 0-50 frost-free days
- • ⚠️ Season extension required - consider cold frames or hoop houses
- • Monitor soil temperature before transplanting (minimum 55-60°F for most crops)
⚠️ Zone 1a Challenges
⚠️Permafrost
⚠️Extreme cold
⚠️Very short growing season
⚠️Limited plant selection
✅ Best Plants for Zone 1a
✓Arctic willows
✓Mosses
✓Lichens
✓Hardy native perennials
❄️ Winter in Zone 1a
Extreme arctic winters with temperatures regularly below -50°F. Permafrost is common.
☀️ Summer in Zone 1a
Brief, cool summers with 24-hour daylight. Growing season may be only 6-8 weeks.
🔥 Heat Management for AHS Zone 1-1
This zone experiences less than 1 heat day per year with minimal heat stress.
🌡️No heat protection needed
🌡️Focus on cold hardiness
Source: American Horticultural Society
📊 Evergreen Hardy White Quick Facts
Days to Maturity
60-80
Difficulty
intermediate
Season
summer
Type
OP
📍 View Evergreen Hardy White Guide for Other Zones
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