Porter's sunflower (Helianthus porteri)

Porter's sunflower

Helianthus porteri grows on granite hillsides. It is an annual herb up to 1 m tall. One plant usually produces 5 or more flower heads, each containing 7 or 8 yellow ray florets surrounding 30 or more yellow disc florets.

Scientific classification

Species

Porter's sunflower (Helianthus porteri)

Asters bellflowers fanflowers and allies

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Annual

Lifespan

Herb

Plant Type

Fall

Bloom Time

20 - 35 ℃

Ideal Temperature

Images of Porter's sunflower

Care Guide for Porter's sunflower

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Porter's sunflower thrives in dry, open areas, showing high drought tolerance. It requires weekly watering to avoid over-saturation and prefers full sunlight. Porter's sunflower aligns its growth with rainwater availability, demonstrating resilience during low precipitation periods.

Fertilize: Fertilizing porter's sunflower promotes healthy growth and blooms. Use balanced fertilizers, increasing nitrogen during vegetative stages, every 4-6 weeks in growing seasons. Adjust frequency in winter and water soil before application. Proper incorporation enhances nutrient absorption, preventing root burn and ensuring porter's sunflower's vitality.

Pruning: Pruning porter's sunflower in early to late spring enhances growth and flowering. Remove dead or spindly stems and thin overcrowded areas to improve air circulation and sunlight exposure. Regular pruning promotes a healthier, more attractive plant while reducing disease risk and encouraging vigorous blooms.

Propagation: Porter's sunflower, native to North America, boasts vibrant blooms and thrives in well-drained soil with full sunlight. Propagate by sowing seeds shallowly in starter trays or garden beds, keeping soil consistently moist. Once established, porter's sunflower self-seeds, rewarding gentle early care with a robust display of yellow flowers.

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