Holly Fern (Polystichum lonchitis)

Holly Fern

Polystichum lonchitis

Its leathery fronds hold year-round evergreen charm, a quiet accent for shaded corners. Evergreen fern; common name: holly fern.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Prefers low to medium indirect light; avoid direct sunlight which causes frond scorching
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Watering Keep soil consistently moist but not waterlogged; allow the top 1 cm of soil to dry between waterings
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Temperature Thrives in cool to temperate conditions; avoid extreme heat above 28°C and prolonged frost below -5°C
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Characteristics

  • Frond: Leathery, dark green, pinnate with spiny-tipped leaflets resembling holly foliage
  • Rhizome: Short, creeping, covered in dense brown scales
  • Sori: Clustered on undersides of mature fronds, protected by round, papery indusia
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Care Guide

Watering

Keep soil evenly moist; mist fronds to boost ambient humidity

Fertilization

Diluted organic feed once every 6 weeks. Cease fertilization in autumn and winter when growth slows

Composted leaf mold tea:Steep fully decomposed leaf mold in water at a 1:20 ratio for 24 hours; drench soil to enrich humus content without introducing pests or odors
Pruning
  • Trim brown, damaged fronds at the base to maintain a tidy clump
  • Remove spent spore-bearing fronds after spore release to redirect energy to new growth
  • Thin overcrowded clumps in early spring to improve airflow and reduce disease risk
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats

Humans: No known toxic effects on humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental foliage for shaded garden beds, indoor terrariums, and container displays