Plant Sunflowers in Zone 6a
Seed-starting, transplant & harvest dates for USDA Zone 6a
Direct sow
Apr 27
Harvest (~80d)
Jul 16
In Zone 6a, the average last spring frost is around April. Sunflowers is a half-hardy crop, so sow it directly around the dates above.
Last spring frost
Apr 20
First fall frost
Oct 13
Growing season
176 days
Full Sunflowers grow guide → · All crops for Zone 6a →
Frequently asked questions
When should I start sunflowers in Zone 6a?
Direct sow outdoors around Apr 27.
Can I direct sow sunflowers in Zone 6a?
Yes, direct sow around Apr 27.