Marsh Cudweed (Gnaphalium uliginosum)

Marsh Cudweed

Gnaphalium uliginosum

Soft silver foliage glows in damp meadows, a quiet wetland gem. Annual herbaceous wildflower; common names: marsh cudweed, low cudweed.

Full sun
2–3/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open, damp meadow habitats
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Watering Keep soil consistently moist; tolerates temporary waterlogging in wetland conditions
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Temperature Hardy to moderate frost; avoids extreme summer heat above 28°C
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Characteristics

  • Leaf: Silvery-grey, woolly, oblong to spatulate leaves in basal rosettes and along stems
  • Flower: Tiny creamy-white to pale yellow clustered capitula with woolly surrounding bracts
  • Stem: Slender, erect to decumbent stems covered in dense white hairs
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Care Guide

Watering

Maintain consistent soil moisture; avoid drying out completely

Fertilization

Diluted compost tea only if soil is severely nutrient-poor. No regular fertilization needed for established wild plantings

Banana peel compost tea:Fully compost banana peels before use; dilute 1:20 for root drench only if soil shows nutrient deficiency
Pruning
  • Deadhead spent flowers to encourage extended blooming (optional for wild plantings)
  • Trim back dead foliage after flowering to tidy planting areas
  • Thin self-sown seedlings to prevent overcrowding in managed gardens
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No documented toxicity to cats

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Traditional herbal use for mild respiratory relief; ornamental wetland ground cover