✓
Growing Yellow Sweet Spanish in Zone 10b
Allium cepa
✓ Well Suited for Zone 10b
Score: 100/100
🌡️ USDA Hardiness Zone 10b
Subtropical/Tropical
USDA 2023 Verified
Growing Season
330-365 days
Winter Minimum
35°F to 40°F
(1.7°C to 4.4°C)
AHS Heat Zone 10-12
151 to 180 heat days per year • Very High heat stress
Typical regions: South Florida, San Diego CA, Southern Texas coast, Los Angeles CA
📊 Data Source:
USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00023174 • Last verified: 1/22/2026
✓ Zone Compatibility Analysis
high confidenceExcellent match: 105 days to maturity with 260 days buffer in 365-day season.
Recommendation: Direct sowing and transplanting both viable. Excellent fit for this zone.
💾 Suitability computed by Solara Agricultural Intelligence Platform
📅 Zone 10b Planting Calendar for Yellow Sweet Spanish
🌱 Start Seeds Indoors
March 12
✓ Database-computed optimal date
🪴 Transplant Outdoors
April 30
✓ Database-computed optimal date
🌾 Direct Sow (Alternative)
2 weeks after last frost
For warm-season crops
🥕 Expected Harvest
August 13
💡 Zone 10b Growing Tips
- • Growing season: 330-365 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 10b Challenges
⚠️Extreme summer heat
⚠️Hurricane risk
⚠️Salt spray in coastal areas
✅ Best Plants for Zone 10b
✓Tropical fruits
✓Coconut palms
✓Orchids
✓Year-round vegetables
❄️ Winter in Zone 10b
Frost-free winters. Minimum temperatures 35°F-40°F.
☀️ Summer in Zone 10b
Hot, often humid summers. Year-round growing season.
🔥 Heat Management for AHS Zone 10-12
This zone experiences 151 to 180 heat days per year with very high heat stress.
🌡️Intensive mulching
🌡️Drip irrigation with timers
🌡️Shade structures required
🌡️Desert-adapted varieties
Source: American Horticultural Society
📊 Yellow Sweet Spanish Quick Facts
Days to Maturity
90-120
Difficulty
intermediate
Season
summer
Type
OP
📍 View Yellow Sweet Spanish Guide for Other Zones
🌱 Other Onion Varieties for Zone 10b
Free Zone 10b Planting Calendar
Get Yellow Sweet Spanish planting dates, frost alerts, and succession timing for your zone — delivered to your inbox.
Get Personalized Yellow Sweet Spanish Planting Dates
Enter your exact location for custom frost dates, planting windows, and harvest predictions tailored to your microclimate.
Try Solara Free →