Asian Spiderflower (Cleome viscosa)

Asian Spiderflower

Cleome viscosa

Bright yellow blooms cluster like tiny fireworks, adding cheerful summer color. Annual herbaceous flowering plant; common names: Asian spiderflower, tickweed.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Thrives in full sun to partial shade; requires at least 6 hours of direct sunlight daily for optimal flowering
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Watering Water deeply when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot
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Temperature Prefers warm tropical to subtropical temperatures; cannot tolerate frost or temperatures below 10°C
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Characteristics

  • Leaf: Palmately compound leaves with 3–5 oval leaflets; glandular-hairy and sticky to the touch
  • Flower: Clustered four-petaled yellow blooms with long, prominent stamens extending outward
  • Stem: Erect, branched stems covered in sticky glandular hairs
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Care Guide

Watering

Keep soil consistently moist but not waterlogged to support active growth and flowering

Fertilization

Apply diluted balanced liquid fertilizer every 2 weeks. Discontinue fertilization in late autumn as growth ceases

Banana Peel Tea:Chop 2–3 banana peels and soak in 1 liter of water for 24 hours; dilute the tea 1:10 with water before applying to soil; discard solid peels to avoid pest attraction
Pruning
  • Deadhead spent flower clusters regularly to encourage continuous blooming throughout the growing season
  • Trim leggy or overgrown stems to promote bushier, more compact growth
  • Remove yellowing or damaged leaves to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No specific listing, but ingestion may cause mild gastrointestinal distress due to irritant compounds

Humans: Contains mild irritant compounds; ingestion may cause oral irritation or mild gastrointestinal upset

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden plant; traditional medicinal uses in some tropical regions for minor ailments