Common Sunflower, Giant Sunflower, Dwarf Sunflower, Helianthus
Direct sow after last frost in full sun — transplanting disturbs the taproot. Excellent windbreak and shade provider for heat-sensitive crops. Attracts pollinators and beneficial insects. Harvest seeds when backs of heads turn yellow-brown and seeds are plump. To dry, cut heads with 12" stem and hang upside down in a dry, ventilated space. Cover drying heads with paper bags to protect from birds.
Light
Full sun
Water
Low water
Temperature
8–38 °C
Frost tolerance
Frost-sensitive — protect below 0 °C
Days to maturity
60–100 days
Ideal soil pH
5.5–7.8
Want Tomatograph to track sunflower for you — frost alerts, weekly reviews, and care logging included? Browse the full library or get started free.