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How to grow sunflowers

Helianthus annuus · asteraceae family · annual crop

Sunflower — hero (AI-generated reference image)
AI-generated reference image. Have a photo of this plant? Suggest one below.

Growing basics

Sunflower is a warm-season crop, usually direct-sown in the garden.

Seeds germinate once soil reaches about 50°F.

Varieties in the library run 80 to 120 days to maturity.

Grows best in full sun.

Frost-tender: plants go out after the last frost.

Space plants 18 to 24 inches apart.

Sources

3 sunflowers in the library

Mammoth Sunflower · Autumn Beauty · Lemon Queen

Each has a full cited page in the library.

Row & Bed covers 3 sunflower varieties, each with a cited care timeline and fertilization schedule, and planting windows worked out for your ZIP.

Set up your garden

See something that does not match your garden? Write to andy@rowandbed.com.