Wavy Plantain Lily (Hosta undulata)

Wavy Plantain Lily

Hosta undulata

Wavy-edged leaves ripple like quiet water, softening shaded corners. Herbaceous perennial foliage plant; common name: Wavy Hosta.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Thrives in dappled shade or bright indirect light; avoid direct midday sun which can scorch the delicate leaf margins
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Watering Water deeply when the top 5 cm of soil becomes dry; avoid overwatering to prevent root rot and fungal growth
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Temperature Hardy to extreme cold temperatures down to -30°C; avoid prolonged exposure to temperatures above 27°C which can cause leaf browning
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Characteristics

  • Leaf: Ovate to lanceolate leaves with undulating margins; variegated green and creamy white in popular cultivars
  • Flower: Bell-shaped, lavender to white blooms on upright, slender scapes above foliage
  • Stem: Smooth, green flowering scapes that rise 45–90 cm above the clumping basal foliage
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Care Guide

Watering

Keep soil consistently moist but not waterlogged to support active foliage growth

Fertilization

Apply diluted balanced fertilizer once monthly to support new foliage growth. Avoid over-fertilizing, as this can lead to leaf burn and reduced variegation

Composted banana peel tea:Soak fully composted banana peels in water for 24 hours, dilute the mixture 1:20 before applying as a root drench; avoid using raw peels to prevent pest infestations
Pruning
  • Remove spent flower scapes at the base after blooming to redirect energy to foliage growth
  • Trim yellowing or damaged leaves at the base to maintain a tidy clump and improve airflow
  • Divide overcrowded clumps every 3–5 years in early spring to promote healthy growth
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion of leaves or roots may cause vomiting, diarrhea, abdominal pain, and lethargy

Humans: Contains saponins that may cause mild oral irritation and gastrointestinal upset if ingested in large quantities

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Garden Uses & Culture

Culture: Symbolizes serenity and shade-loving beauty; widely used in Japanese-style shaded garden designs

Usage: Ornamental ground cover for shaded garden beds, container foliage plant for indoor spaces, and cut foliage for floral arrangements