Can You Grow Sunflower in Zone 11b?
Quick Answer:
✅ Yes — Sunflowers grow brilliantly here — they love the warm season and produce quickly.
✅ Yes
Sunflower grows well in Zone 11b
Sunflowers grow brilliantly here — they love the warm season and produce quickly.
📅 When to Plant in Zone 11b
Direct Sow
Jan 1
Last Sow Date
Oct 12
🌾 Harvest
Mar 2 – Mar 22
Based on Zone 11b's average last frost of no frost and first frost of no frost.
🌱 Growing Sunflower in Zone 11b
Direct sow after last frost in the sunniest spot available. No transplanting needed. Giant varieties need staking. Harvest seed heads when the back turns brown and seeds are firm.
🪴 Container: 5+ gal pot
🗺️ USDA Plant Hardiness Zones
Zone 11 is shown in
this colour
on the map below
2023 USDA Plant Hardiness Zone Map — public domain. USDA Agricultural Research Service
USDA zones run 1a–13b (26 half-zones). Each full zone above covers both the a and b half-zones. Browse all US zones →
Technical climate details for Zone 11b
- USDA Zone
- 11b
- Last Frost
- no frost
- First Frost
- no frost
- Frost-Free Days
- 365
- Sunflower Zone Range
- 2a – 11b
- Days to Harvest
- 60–80 days
Frequently Asked Questions
Sunflowers grow brilliantly here — they love the warm season and produce quickly.
Zone 11b is in USDA Hardiness Zone 11b with approximately 365 frost-free days per year.
Sunflower grows in USDA Zones 2a–11b.
Sunflower is beginner-friendly and one of the easier crops to grow.