Pompom Weed (Campuloclinium macrocephalum)

Pompom Weed

Campuloclinium macrocephalum

Fluffy pink pompom blooms dot grasslands, a cheerful yet invasive wildflower. Herbaceous perennial; common name: pompom weed.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates direct sunlight for most of the day, with mild shade in extreme heat
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Watering Water deeply when the top 2–3 cm of soil is dry; drought-tolerant once established
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Temperature Thrives in warm temperate to subtropical climates; tolerates light frost but not prolonged freezing temperatures
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Characteristics

  • Leaf: Simple, ovate to lanceolate leaves with serrated margins; fuzzy texture on undersides
  • Flower: Round, pink to lavender pompom inflorescences composed of tiny disk florets
  • Stem: Erect, branching stems covered in fine white trichomes
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Care Guide

Watering

Water regularly to support active growth and flowering

Fertilization

Light, diluted feed once monthly. Use balanced, low-strength feed to support flowering without promoting excessive foliage growth

Banana peel compost tea:Compost banana peels for 2–3 weeks; steep in water for 24 hours, dilute 1:20 for root drench to enhance bloom production
Pruning
  • Deadhead spent blooms immediately to prevent wind-dispersed self-seeding and limit invasive spread
  • Trim back overgrown stems to 10–15 cm in late winter to encourage dense new growth
  • Remove diseased or yellowing foliage to improve airflow and reduce pest habitat
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No listed toxicity to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental wildflower; targeted for invasive species management in non-native regions