Silverleaf sunflower (Helianthus argophyllus)

Silverleaf sunflower

The silverleaf sunflower is a tall, fast-growing, and low-maintenance perennial plant. It produces attractive yellow and large flower heads. It has smooth, silvery foliage, thus its common name 'Silverleaf.' silverleaf sunflower is a perfect choice for cottage, wildflower, and butterfly gardens.

Scientific classification

Species

Silverleaf sunflower (Helianthus argophyllus)

Asters bellflowers fanflowers and allies

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1.8 m to 3.5 m

Plant Height

20 - 35 ℃

Ideal Temperature

Images of Silverleaf sunflower

Distribution of Silverleaf sunflower

Distribution Map

Silverleaf sunflower is native to North America, particularly thriving in subtropical regions. Over time, it has been introduced to various other regions, establishing a presence across continents such as Asia, Africa, and Oceania. Its ability to adapt has allowed it to become a part of diverse ecosystems beyond its original habitat.

Native

Cultivated

Invasive

Introduced

No species reported

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Care Guide for Silverleaf sunflower

Every 1-2 weeks

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Silverleaf sunflower prefers moderate humidity and balanced water distribution, requiring watering once every 1-2 weeks. Thriving outdoors, this deciduous plant's growth cycle is significantly influenced by consistent watering, making it essential to maintain its schedule for optimal health.

Fertilize: For silverleaf sunflower in pots, apply liquid or compound fertilizer every 7 to 10 days, focusing on nitrogen during seedling growth, then phosphate-potassium before blooming. In gardens, minimal fertilizer is needed if soil is fertile; otherwise, apply nitrogen early and phosphorus-potassium later, every 20 days.

Pruning: Silverleaf sunflower features silver-green leaves and bright yellow flowers. Annual pruning in early spring enhances shape and blooms by removing dead stems and thinning overcrowded areas. This practice improves air circulation, promotes flowering, and reduces disease risk. Consult horticultural sources for climate-specific guidance.

Propagation: Sunflowers are propagated by sowing seeds and rely on cross-pollination from insects and bees. Artificial pollination during bloom can enhance seed setting rates, resulting in increased seed production.

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