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Growing Evergreen Hardy White in Zone 8b

Allium cepa

✓ Well Suited for Zone 8b

Score: 100/100

🌡️ USDA Hardiness Zone 8b

Mild/Subtropical Transition

USDA 2023 Verified

Growing Season

230-260 days

Winter Minimum

15°F to 20°F

(-9.4°C to -6.7°C)

Last Spring Frost

March 16

50% probability

First Fall Frost

November 21

50% probability

AHS Heat Zone 6-10

46 to 60 heat days per year • Moderate heat stress

Typical regions: Portland OR, Coastal South Carolina, Central Texas

📊 Data Source:

USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00024229 • Last verified: 1/22/2026

✓ Zone Compatibility Analysis

high confidence

Excellent match: 70 days to maturity with 190 days buffer in 260-day season.

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

💾 Suitability computed by Solara Agricultural Intelligence Platform

📅 Zone 8b Planting Calendar for Evergreen Hardy White

Based on NOAA climate normals for Zone 8b. 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 16

For warm-season crops

🥕 Expected Harvest

July 9

Complete before November 21

💡 Zone 8b Growing Tips

• Growing season: 230-260 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 8b Challenges

⚠️Summer heat

⚠️Occasional freezes

⚠️Drought in some areas

✅ Best Plants for Zone 8b

✓Year-round vegetables

✓Hardy citrus

✓Palms with protection

❄️ Winter in Zone 8b

Mild winters with rare freezes to 15°F-20°F.

☀️ Summer in Zone 8b

Hot summers with very long growing season.

🔥 Heat Management for AHS Zone 6-10

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

📊 Evergreen Hardy White Quick Facts

Days to Maturity

60-80

Difficulty

intermediate

Season

summer

Type

📍 View Evergreen Hardy White Guide for Other Zones

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

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