Rayless sunflower (Helianthus radula)

Rayless sunflower

Helianthus radula grows in sandy, open woodlands such as pine barrens. It is an perennial herb up to 1 m tall. One plant usually produces only one flower head, containing 0-8 yellow ray florets surrounding sometimes as many as 150 or more yellow or brown disc florets.

Scientific classification

Species

Rayless sunflower (Helianthus radula)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

Herb

Plant Type

20 - 35 ℃

Ideal Temperature

Images of Rayless sunflower

Care Guide for Rayless sunflower

Every week

Water

Full sun

Sunlight

20 - 35 ℃

Ideal Temperature

Water: Originating from environments with moderate moisture, rayless sunflower thrives with consistent weekly watering. It synchronizes flowering with seasonal rainfall, ensuring optimal hydration and bloom health. This outdoor plant, commonly found in temperate regions, does not favor excessive wetness or extreme drought conditions.

Fertilize: For rayless sunflower, use balanced fertilizer monthly during the growing season, reducing frequency in cooler months. Follow label rates to prevent over-fertilization and ensure even distribution at the base. Water thoroughly afterward. Always wear gloves and adhere to instructions for optimal health and appearance.

Pruning: Rayless sunflower lacks ray flowers and should be pruned in early to late spring to enhance health and bloom production. Remove dead stems and spent flowers for better airflow and sunlight. Proper pruning reduces disease risk and strengthens the plant, ensuring robust growth.

Propagation: Propagate rayless sunflower by sowing seeds directly into moist soil to ensure good soil-to-seed contact, which enhances germination. Use a fine-textured seedbed with a light soil covering for uniform growth. Avoid deep burial to promote healthy seedling development.

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