Mouse-ear Hawkweed (Pilosella officinarum)

Mouse-ear Hawkweed

Pilosella officinarum

Fuzzy silver foliage hugs the ground like soft mouse ears. Low-growing perennial herb; common name: Mouse-ear Hawkweed.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates dry, nutrient-poor soils
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Watering Water deeply only during prolonged dry spells; drought-tolerant once established
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Temperature Hardy to -20°C; withstands hot, dry summer conditions without significant stress
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Characteristics

  • Leaf: Basal rosette of fuzzy, silver-green, oblong leaves with entire margins
  • Flower: Bright yellow daisy-like composite heads on slender, hairy stems
  • Stem: Erect, unbranched stems with sparse, small leaves; covered in fine white hairs
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Care Guide

Watering

Water occasionally during extended dry periods; avoid overwatering to prevent root rot

Fertilization

Optional diluted feed once monthly only if growth is stunted. Avoid high-nitrogen fertilizers that can disrupt its low-growing form

Eggshell powder topdress:Crush dried eggshells into fine powder and sprinkle around plant bases to improve soil drainage and add calcium; avoid overapplication to prevent soil alkalinity spikes
Pruning
  • Deadhead spent flowers to prevent unwanted self-seeding in managed gardens
  • Trim back overgrown rosettes in early spring to maintain a compact, neat form
  • Remove yellow or damaged leaves to improve airflow and reduce pest habitat
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No known toxicity to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Historically used in herbal medicine for minor wound care; ornamental ground cover for dry landscapes