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Growing Southern Giant Curled in Zone 6b

Brassica juncea

✓ Well Suited for Zone 6b
Score: 100/100

🌡️ USDA Hardiness Zone 6b

Moderate Continental

USDA 2023 Verified
Growing Season
160-190 days
Winter Minimum
-5°F to 0°F
(-20.6°C to -17.8°C)
Last Spring Frost
April 15
50% probability
First Fall Frost
October 27
50% probability
AHS Heat Zone 4-8
15 to 30 heat days per year • Low to Moderate heat stress

Typical regions: Chicago IL, St. Louis MO, Kansas City, Southern Pennsylvania

📊 Data Source:
USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00094846 • Last verified: 1/22/2026

✓ Zone Compatibility Analysis

high confidence

Excellent match: 37 days to maturity with 153 days buffer in 190-day season.

Recommendation: Direct sowing and transplanting both viable. Excellent fit for this zone.

💾 Suitability computed by Solara Agricultural Intelligence Platform

📅 Zone 6b Planting Calendar for Southern Giant Curled

Based on NOAA climate normals for Zone 6b. 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 April 15
For warm-season crops
🥕 Expected Harvest
June 6
Complete before October 27

💡 Zone 6b Growing Tips

  • • Growing season: 160-190 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 6b Challenges

⚠️Variable spring weather
⚠️Summer heat and humidity
⚠️Japanese beetles

✅ Best Plants for Zone 6b

✓Full vegetable garden
✓Most warm-season crops
✓Wide variety of ornamentals

❄️ Winter in Zone 6b

Moderate winters with lows reaching 0°F to -5°F.

☀️ Summer in Zone 6b

Warm to hot summers, often humid in eastern regions.

🔥 Heat Management for AHS Zone 4-8

This zone experiences 15 to 30 heat days per year with low to moderate heat stress.

🌡️Mulching
🌡️Consistent watering
🌡️Some afternoon shade for sensitive plants

Source: American Horticultural Society

📊 Southern Giant Curled Quick Facts

Days to Maturity
30-45
Difficulty
intermediate
Season
summer
Type
OP

📍 View Southern Giant Curled Guide for Other Zones

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

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