Lesser Masterwort (Astrantia minor)

Lesser Masterwort

Astrantia minor

Delicate pincushion blooms bring dainty charm to shaded borders. Herbaceous perennial; common name: lesser masterwort.

Partial sun
2/week
Beginner
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Plant Needs

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Sunlight Prefers partial shade with dappled morning sunlight; avoid harsh midday direct sun which can scorch leaves
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Watering Keep soil consistently moist but well-drained; avoid waterlogging to prevent root rot
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Temperature Hardy to -15°C for winter dormancy; thrives in cool temperate conditions, avoid prolonged heat above 28°C
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Characteristics

  • Leaf: Basal rosette of deeply lobed, glossy green leaves with serrated margins
  • Flower: Tiny clustered florets surrounded by papery pale pink or white bracts forming a pincushion shape
  • Stem: Slender, upright green stems with sparse stem leaves
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Care Guide

Watering

Keep top 2 cm of soil moist; apply mulch to retain moisture and reduce evaporation

Fertilization

Diluted organic feed once every 4 weeks. Use low-nitrogen feed to prioritize flower production over foliage growth

Banana peel compost tea:Fully compost banana peels, steep in water for 24 hours, dilute 1:20, and apply as a root drench to support blooming
Pruning
  • Deadhead spent blooms regularly to encourage extended flowering through early summer
  • Cut back all stems to ground level after foliage dies back in late autumn
  • 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: Non-toxic to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental garden plant; cut flower for small bouquets