Showy Sunflower (Helianthus laetiflorus)

Showy Sunflower

Helianthus laetiflorus

Vibrant golden blooms light up late summer meadows. Tall, clumping perennial sunflower; common name: Showy Sunflower.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun exposure required for abundant flowering; tolerates partial shade but produces fewer blooms
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Watering Water deeply when top 5–7 cm of soil is dry; avoid overwatering to prevent root rot
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Temperature Hardy to -30°C; thrives in warm summer temperatures up to 35°C
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Characteristics

  • Leaf: Lanceolate to ovate, rough-textured, serrated margins, 10–20 cm long
  • Flower: 7–10 cm diameter golden yellow ray florets surrounding dark brown central disc florets
  • Stem: Sturdy, hairy green stems, branching near the top
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Care Guide

Watering

Keep soil consistently moist during active growth

Fertilization

Apply balanced slow-release fertilizer once at planting. Avoid over-fertilizing to prevent leggy growth and reduced flowering

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pests
Pruning
  • Deadhead spent blooms to encourage extended flowering
  • Cut back stems to ground level in late fall after foliage dies back
  • Thin clumps every 2–3 years in spring to improve airflow and reduce overcrowding
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed non-toxic to cats; no reported toxicity symptoms

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Garden Uses & Culture

Culture: Symbolizes adoration and longevity; popular in native wildflower gardens

Usage: Ornamental garden plant; attracts pollinators like bees and butterflies