?
Growing Mammoth Melting Sugar in Zone 4a
Pisum sativum
Varies for Zone 4a
🌡️ 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
💾 Suitability computed by Solara Agricultural Intelligence Platform
📅 Zone 4a Planting Calendar for Mammoth Melting Sugar
Based on NOAA climate normals for Zone 4a. Dates show 50% probability (average year).
🌱 Start Seeds Indoors
6-8 weeks before May 10
Approximately late winter to early spring
🪴 Transplant Outdoors
After May 10
When soil reaches 60°F+
🌾 Direct Sow (Alternative)
2 weeks after May 10
For warm-season crops
🥕 Expected Harvest
68-78 days after planting
Complete before October 2
💡 Zone 4a Growing Tips
- • Growing season: 110-140 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 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
📊 Mammoth Melting Sugar Quick Facts
Days to Maturity
68-78
Difficulty
beginner
Season
spring
Type
Heirloom
📍 View Mammoth Melting Sugar Guide for Other Zones
Free Zone 4a Planting Calendar
Get Mammoth Melting Sugar planting dates, frost alerts, and succession timing for your zone — delivered to your inbox.
Get Personalized Mammoth Melting Sugar Planting Dates
Enter your exact location for custom frost dates, planting windows, and harvest predictions tailored to your microclimate.
Try Solara Free →