When to Plant Sunflower in Zone 11
Helianthus annuus
Last updated: Apr 25, 2026 · Sources: USDA, NOAA, Cooperative ExtensionZone 11 Planting Schedule
Direct Sow
Jan 29
Directly in garden bed
First Harvest
Apr 19
70–100 days after planting
Season Ends
Jun 18
Before first frost (Dec 25)
Quick Facts
Sunlight
☀️ Full Sun
Water Needs
💧 Low
Spacing
24 inches apart
Planting Depth
1.0 inch
Min Soil Temp
55°F
Germination
7–14 days
Days to Maturity
70–100 days
Frost Tolerance
No frost tolerance
Soil pH
6.0–7.5
Difficulty
Easy
Recommended for Zone 11
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Companion planting improves growth, deters pests, and makes better use of garden space.
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Potato
Sunflower Schedule — All Zones
| Zone | Start Indoors | Transplant | Direct Sow | Harvest Start | Harvest End |
|---|---|---|---|---|---|
| Zone 2 | — | — | Jun 8 | Aug 27 | Sep 2 |
| Zone 3 | — | — | May 29 | Aug 17 | Sep 12 |
| Zone 4 | — | — | May 24 | Aug 12 | Sep 22 |
| Zone 5 | — | — | May 14 | Aug 2 | Oct 1 |
| Zone 6 | — | — | Apr 29 | Jul 18 | Sep 16 |
| Zone 7 | — | — | Apr 19 | Jul 8 | Sep 6 |
| Zone 8 | — | — | Apr 3 | Jun 22 | Aug 21 |
| Zone 9 | — | — | Mar 14 | Jun 2 | Aug 1 |
| Zone 10 | — | — | Feb 24 | May 15 | Jul 14 |
| Zone 11 | — | — | Jan 29 | Apr 19 | Jun 18 |
📚 Data Sources
Frost dates: NOAA Climate Normals 1991–2020, National Centers for Environmental Information.Hardiness zones: USDA Plant Hardiness Zone Map, Agricultural Research Service.
Growing requirements: Cooperative Extension Services — NC State, Penn State, University of Florida IFAS.
Companion planting: Cornell University Cooperative Extension.
Data compiled from public agricultural sources. Always verify with your local extension office for micro-climate adjustments.