Plant Sunflowers in Zone 8b
Seed-starting, transplant & harvest dates for USDA Zone 8b
Direct sow
Mar 22
Harvest (~80d)
Jun 10
In Zone 8b, the average last spring frost is around March. Sunflowers is a half-hardy crop, so sow it directly around the dates above.
Last spring frost
Mar 15
First fall frost
Nov 15
Growing season
245 days
Full Sunflowers grow guide → · All crops for Zone 8b →
Frequently asked questions
When should I start sunflowers in Zone 8b?
Direct sow outdoors around Mar 22.
Can I direct sow sunflowers in Zone 8b?
Yes, direct sow around Mar 22.