White-rimmed Hosta (Hosta undulata var. albomarginata)

White-rimmed Hosta

Hosta undulata var. albomarginata

It thrives in the quiet shadows, painting the woodland floor with strokes of green and white. Herbaceous perennial; other names: Variegated Plantain Lily.

Prefers partial to full shade; morning sun is tolerated, but harsh afternoon sun can scorch the white leaf margins.
2/week
Beginner
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Plant Needs

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Sunlight Prefers partial to full shade; morning sun is tolerated, but harsh afternoon sun can scorch the white leaf margins.
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Watering Requires consistently moist, well-draining soil; do not allow the soil to dry out completely, especially in warmer months.
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Temperature Highly cold-tolerant, thriving in USDA zones 3-9; requires a winter dormancy period to reset its growth cycle.
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Characteristics

  • Leaves: Basal rosette arrangement, ovate to lanceolate, featuring a medium green center with irregular, crisp white margins and slightly wavy (undulate) edges;
  • Flowers: Funnel-shaped, pale lavender to violet, borne on tall, leafless scapes (racemes) rising well above the foliage;
  • Roots: Fleshy, fibrous rhizomes that form dense, expanding clumps over time.
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Care Guide

Watering

Water deeply twice a week, keeping the soil evenly moist but not waterlogged.

Fertilization

Apply a balanced, slow-release fertilizer as new shoots emerge from the soil.. Avoid over-fertilizing with high nitrogen, which can cause leggy growth and diminish the crisp leaf variegation.

Coffee Ground and Eggshell Mix:Mix used coffee grounds and crushed, rinsed eggshells into the topsoil around the base. Coffee grounds provide a gentle nitrogen boost for lush foliage, while the sharp edges of the eggshells help deter slugs and snails, which are common pests for Hostas. Avoid applying in thick, wet clumps to prevent mold.
Pruning
  • Remove spent flower scapes at the base to redirect the plant's energy to root and foliage growth;
  • Cut back all dead and yellowing foliage to the ground in late autumn after the first frost;
  • Clear away debris around the crown in winter to eliminate overwintering sites for slugs and insect pests.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Toxic to cats per ASPCA due to saponins, causing gastrointestinal upset.

Humans: Generally considered non-toxic to humans; incidental contact or micro-ingestion is harmless.

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Garden Uses & Culture

Culture: Highly prized in Victorian English shade gardens and contemporary American landscaping as an indispensable, reliable foliage plant for low-light areas.

Usage: - Excellent as a ground cover or edging plant in woodland gardens; - Ideal for underplanting beneath large shade trees where grass struggles to grow; - Performs exceptionally well in shaded container gardens.