Smallspike False Nettle (Boehmeria cylindrica)

Smallspike False Nettle

Boehmeria cylindrica

It forms soft, dense clumps in damp shade, a quiet groundcover for wet woodlands. Perennial herbaceous plant; common name: smallspike false nettle.

Partial sun
2–3/week
Beginner
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Plant Needs

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Sunlight Thrives in partial to full shade; tolerates dappled sunlight, avoid direct midday sun to prevent leaf scorch
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Watering Keep soil consistently moist, as it prefers damp, well-drained conditions; avoid prolonged waterlogging
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Temperature Hardy to USDA zones 5–9; tolerates mild frost, avoid prolonged temperatures below -5°C
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Characteristics

  • Leaf: Simple, ovate to lanceolate leaves with serrated margins; medium green, softly pubescent
  • Flower: Tiny, greenish-white, cylindrical spike inflorescences; non-showy
  • Stem: Erect, slender, green stems with fine hairs
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Care Guide

Watering

Maintain consistent soil moisture; water when top 2 cm of soil feels dry

Fertilization

Diluted balanced feed once every 4 weeks. Avoid over-fertilizing to prevent excessive foliage growth at the expense of clumping habit

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench to support healthy foliage growth without risk of nutrient burn
Pruning
  • Trim back dead foliage in late winter to encourage new spring growth
  • Thin overcrowded clumps to improve airflow and reduce disease risk
  • Remove spent flower spikes to maintain a neat, tidy appearance
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse effects from ingestion or contact

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Garden Uses & Culture

Culture: N/A

Usage: Groundcover for damp areas; erosion control in wet soils