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Growing Tokyo Long White in Zone 8a

Allium cepa

✓ Well Suited for Zone 8a
Score: 100/100

🌡️ USDA Hardiness Zone 8a

Mild/Subtropical Transition

USDA 2023 Verified
Growing Season
210-240 days
Winter Minimum
10°F to 15°F
(-12.2°C to -9.4°C)
Last Spring Frost
March 21
50% probability
First Fall Frost
November 21
50% probability
AHS Heat Zone 6-9
46 to 60 heat days per year • Moderate heat stress

Typical regions: Dallas TX, Atlanta GA, Coastal Oregon, Coastal Washington

📊 Data Source:
USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00013874 • Last verified: 1/22/2026

✓ Zone Compatibility Analysis

high confidence

Excellent match: 70 days to maturity with 170 days buffer in 240-day season.

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

💾 Suitability computed by Solara Agricultural Intelligence Platform

📅 Zone 8a Planting Calendar for Tokyo Long White

Based on NOAA climate normals for Zone 8a. 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 March 21
For warm-season crops
🥕 Expected Harvest
July 9
Complete before November 21

💡 Zone 8a Growing Tips

  • • Growing season: 210-240 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 8a Challenges

⚠️Summer heat
⚠️Humidity in Southeast
⚠️Occasional hard freezes

✅ Best Plants for Zone 8a

✓Year-round vegetables
✓Citrus with protection
✓Camellias
✓Azaleas

❄️ Winter in Zone 8a

Mild winters with occasional freezes to 10°F-15°F.

☀️ Summer in Zone 8a

Hot summers, often humid. Extended growing season.

🔥 Heat Management for AHS Zone 6-9

This zone experiences 46 to 60 heat days per year with moderate heat stress.

🌡️Heavy mulching
🌡️Consistent irrigation
🌡️Shade cloth for sensitive crops

Source: American Horticultural Society

📊 Tokyo Long White Quick Facts

Days to Maturity
60-80
Difficulty
intermediate
Season
summer
Type
OP

📍 View Tokyo Long White 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

🌱 Other Onion Varieties for Zone 8a

Tokyo Long White
65-75 days
Tokyo Long White
65-75 days
Tokyo Long White
65-75 days
Tokyo Long White
65-75 days

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