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Flowers · Warm-season annual

Sunflower

Helianthus annuus

Few plants command a garden quite like the sunflower, turning its golden face skyward and stopping every passerby in their tracks.

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Sunlight
Full sun
Water
1 in per week
Harvest
70-100 days to bloom from seed
Hardiness
Tender - frost-sensitive
About

Born to Chase the Sun

Helianthus annuus is native to North America, where Indigenous peoples cultivated it for food, oil, and dye for thousands of years before it became one of the world's most recognizable garden plants. Today varieties range from dwarf patio types under a foot tall to towering giants that clear 12 feet with ease.

Beyond their looks, sunflowers are workhorses. Their seeds feed birds and people alike, their pollen sustains bees through summer, and their deep taproots help break up compacted soil. Grow them in a cutting garden, along a fence line, or simply wherever you need a burst of unapologetic height and color.

How to grow

Planting & care

Direct-sow seeds 1 inch deep after the last frost date, once soil has warmed to at least 50 degrees F. Choose a spot with at least 6-8 hours of direct sun and well-drained soil. Thin seedlings to 12-24 inches apart depending on variety - crowded plants grow tall but bloom poorly.

Water deeply but infrequently, encouraging roots to chase moisture downward. Avoid wetting the foliage to reduce disease pressure. Most varieties need no fertilizer in average soil; excess nitrogen pushes lush leaves at the expense of flowers. Stake tall cultivars in windy sites once they reach 3 feet.

Good to know

They Stop Tracking - Eventually

Young sunflowers exhibit true solar tracking (heliotropism), swinging east to west each day to maximize warmth for growth. Once the flower opens fully, that movement stops and the mature bloom typically faces east - a smart design that warms pollinators arriving on cool mornings.

Common questions

How much sun does Sunflower need?

Sunflower grows best in full sun.

How often should you water Sunflower?

Give it about 1 in per week.

When is Sunflower ready to harvest?

Sunflower is usually ready in 70-100 days to bloom from seed.

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