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Growing Red Oak Leaf in Zone 4b
Lactuca sativa
Varies for Zone 4b
🌡️ USDA Hardiness Zone 4b
Cold Continental
USDA 2023 Verified
Growing Season
120-150 days
Winter Minimum
-25°F to -20°F
(-31.7°C to -28.9°C)
Last Spring Frost
April 25
50% probability
First Fall Frost
October 17
50% probability
AHS Heat Zone 2-6
1 to 7 heat days per year • Very Low heat stress
Typical regions: Upper Midwest, Northern New England, High elevation areas, Minneapolis MN
📊 Data Source:
USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00014820 • Last verified: 1/22/2026
📊 Zone Compatibility Analysis
💾 Suitability computed by Solara Agricultural Intelligence Platform
📅 Zone 4b Planting Calendar for Red Oak Leaf
Based on NOAA climate normals for Zone 4b. Dates show 50% probability (average year).
🌱 Start Seeds Indoors
6-8 weeks before April 25
Approximately late winter to early spring
🪴 Transplant Outdoors
After April 25
When soil reaches 60°F+
🌾 Direct Sow (Alternative)
2 weeks after April 25
For warm-season crops
🥕 Expected Harvest
46-56 days after planting
Complete before October 17
💡 Zone 4b Growing Tips
- • Growing season: 120-150 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 4b Challenges
⚠️Cold winters
⚠️Variable spring weather
⚠️Occasional late frosts
✅ Best Plants for Zone 4b
✓Full vegetable garden
✓Fruit trees
✓Ornamental shrubs
✓Perennials
❄️ Winter in Zone 4b
Cold winters with lows reaching -20°F to -25°F.
☀️ Summer in Zone 4b
Warm summers suitable for most garden vegetables.
🔥 Heat Management for AHS Zone 2-6
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
📊 Red Oak Leaf Quick Facts
Days to Maturity
46-56
Difficulty
beginner
Season
spring
Type
Heirloom
📍 View Red Oak Leaf Guide for Other Zones
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