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Growing Marmande in Zone 9a
Solanum lycopersicum
Varies for Zone 9a
🌡️ USDA Hardiness Zone 9a
Subtropical/Mediterranean
USDA 2023 Verified
Growing Season
250-290 days
Winter Minimum
20°F to 25°F
(-6.7°C to -3.9°C)
Last Spring Frost
March 6
50% probability
First Fall Frost
November 21
50% probability
AHS Heat Zone 7-10
61 to 90 heat days per year • Moderate to High heat stress
Typical regions: Seattle WA, San Francisco Bay Area, Houston TX, Coastal Louisiana
📊 Data Source:
USDA Plant Hardiness Zone Map 2023 • Frost dates from NOAA station USW00024233 • Last verified: 1/22/2026
📊 Zone Compatibility Analysis
💾 Suitability computed by Solara Agricultural Intelligence Platform
📅 Zone 9a Planting Calendar for Marmande
Based on NOAA climate normals for Zone 9a. Dates show 50% probability (average year).
🌱 Start Seeds Indoors
6-8 weeks before March 6
Approximately late winter to early spring
🪴 Transplant Outdoors
After March 6
When soil reaches 60°F+
🌾 Direct Sow (Alternative)
2 weeks after March 6
For warm-season crops
🥕 Expected Harvest
67-77 days after planting
Complete before November 21
💡 Zone 9a Growing Tips
- • Growing season: 250-290 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 9a Challenges
⚠️Summer heat in South
⚠️Fog in coastal areas
⚠️Rare freezes
✅ Best Plants for Zone 9a
✓Citrus
✓Avocados with protection
✓Tropical vegetables
✓Palms
❄️ Winter in Zone 9a
Mild winters with rare light freezes to 20°F-25°F.
☀️ Summer in Zone 9a
Warm to hot summers depending on region. Very long growing season.
🔥 Heat Management for AHS Zone 7-10
This zone experiences 61 to 90 heat days per year with moderate to high heat stress.
🌡️Deep mulching
🌡️Morning watering
🌡️Shade structures
🌡️Heat-tolerant varieties
Source: American Horticultural Society
📊 Marmande Quick Facts
Days to Maturity
67-77
Difficulty
beginner
Season
summer
Type
Heirloom
📍 View Marmande Guide for Other Zones
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