Snow Squarestem (Melanthera nivea)

Snow Squarestem

Melanthera nivea

Its crisp white blooms dot sunny meadows like scattered snowflakes. Herbaceous perennial wildflower; common name: Snow Squarestem.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial sun; tolerates brief afternoon shade in hot, arid climates
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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 Hardy to USDA zone 8; withstands mild frost and summer heat up to 35°C
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Characteristics

  • Leaf: Opposite, ovate to lanceolate leaves with serrated margins; medium green, slightly hairy surfaces
  • Flower: Small, daisy-like white composite heads with yellow disc florets; clustered at stem tips
  • Stem: Square, green to reddish-brown stems with fine pubescence
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Care Guide

Watering

Keep soil consistently moist during active growth; avoid waterlogging

Fertilization

Diluted balanced feed every 4 weeks. Skip fertilization in winter when growth is dormant

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 with water for root drenching; avoid applying to foliage
Pruning
  • Deadhead spent blooms regularly to encourage continuous flowering
  • Cut back stems by 1/3 in late autumn to promote dense new growth in spring
  • Thin overcrowded stems to improve airflow and reduce fungal disease risk
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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: Ornamental wildflower for pollinator gardens; nectar source for bees, butterflies, and other beneficial insects