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Sunflower

Sunflower

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

Companion plants
CucumberSquashCornTomato
Watch for pests
AphidsBirdsCaterpillarCucumber Beetle
Disease risk
Downy MildewRustVerticillium WiltSclerotinia

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