Great Masterwort (Astrantia major)

Great Masterwort

Astrantia major

Delicate pincushion blooms add soft texture to garden borders. Herbaceous perennial; common name: Great Masterwort.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Partial to full sun; tolerates light shade in hot summer climates to prevent leaf scorch
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Watering Water deeply when the top 5 cm of soil dries out; avoid waterlogging to prevent root rot
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Temperature Hardy to -15°C; prefers cool to temperate conditions, avoid prolonged temperatures above 30°C
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Characteristics

  • Leaf: Basal leaves are palmate, lobed, dark green with serrated edges; stem leaves are smaller and divided
  • Flower: Tiny white to pale pink flowers clustered in compact pincushion-like umbels with papery, star-shaped bracts
  • Stem: Slender, upright green stems with minimal branching
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Care Guide

Watering

Keep soil consistently moist but not waterlogged

Fertilization

Apply balanced diluted feed every 2 weeks. Avoid over-fertilizing to prevent excessive foliage growth at the expense of blooms

Banana peel tea:Soak 1 peeled banana in 1L of water for 24 hours; dilute 1:2 with water before drenching soil to avoid nutrient burn
Pruning
  • Deadhead spent blooms regularly to encourage extended flowering into mid-summer
  • Cut back entire plant to ground level after first autumn frost to prepare for winter dormancy
  • 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 confirmed non-toxic to cats; no reported toxicity

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

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden border plant; cut flower for fresh floral arrangements