Great Masterwort
Astrantia major
Great masterwort is a clump-forming herbaceous perennial native to the mountain meadows, grasslands, and forest clearings of central and southern Europe (the Pyrenees, Carpathians, and Balkans) and east through the Caucasus to Anatolia (Wikipedia). Its distinctive pincushion flowerheads — a dome of tiny florets ringed by papery star-shaped bracts — bloom from June through September in white, pink, and deep red tones, making it a long-season cottage-garden favorite. It performs beautifully in cool, evenly moist sites with partial shade. The honest catch: Astrantia is a cool-climate specialist that sulks badly in hot, humid summers — in zones 7b and warmer with heat-laden summers it loses vigor, fades early, and is prone to powdery mildew; consistent moisture is non-negotiable and drought even for a week can trigger early summer dormancy.
Climate fit: narrow (30/100)
Border
Pollinator
Filler
Light
Part sun / Part shade
Water
Consistent moisture
Mature size
24-36" tall · 18" apart
Hardy in zones
4a-7b
very cold to cold winters
Native in Illinois
No
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Entomophilous: mainly pollinated by beetles but also by flies, bees, and other insects (Wikipedia).
Cold hardiness
These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✓
Well-suited today and still thriving in 2050.
Heat tolerance
Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...
Where this plant fits
Suitable across 34 ecoregions — 26 climate-resilient through 2070 · 8 suited today. Best matches first.
Appalachian mixed mesophytic forests
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Appalachian-Blue Ridge forests
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Arizona Mountains forests
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Blue Mountains forests
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Canadian Aspen forests and parklands
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Central Tallgrass prairie
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Central-Southern Cascades Forests
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Colorado Rockies forests
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Cross-Timbers savanna-woodland
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Eastern Canadian Forest-Boreal transition
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Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Astilbe chinensis
Chinese astilbe
Chinese astilbe is a clump-forming herbaceous perennial whose wild range Wikipedia gives as eastern China, the Japanese archipelago, and Korea (with Manchuria and the Amur basin in broader botanical-country treatments), growing along shaded streams and in damp broadleaf-forest margins at elevations of 400 to 3,600 metres. In the garden it is prized for feathery, upright plumes in mauve, rose, or purple over ferny, deep-green compound foliage in summer, and is one of the more reliable performers in the part-shade border. The honest catch is moisture: despite being the most drought-tolerant species in the genus, it still demands consistently moist soil and will scorch and collapse quickly in hot, dry exposure, so plant it where soil never dries out and expect little in dry shade under thirsty tree roots.
Penstemon eatonii
Firecracker penstemon
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Pycnanthemum muticum
Short-toothed mountain mint
A clump-forming aromatic native perennial of eastern North America, grown as much for its silvery floral bracts as its bloom — the upper leaves below each flower head turn a frosted, dusty-mint color in summer. Dense flat-topped clusters of tiny two-lipped pinkish-white flowers cover the plant from mid to late summer and are a magnet for bees and butterflies. Unlike the true mints (Mentha), it spreads only modestly by rhizome and is not invasive.
Aquilegia canadensis
Wild columbine
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Viola sororia
Common blue violet
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Pulmonaria officinalis
Common Lungwort
Common lungwort is a low-growing, rhizomatous herbaceous perennial native to deciduous and beech-mixed woodlands of central and western Europe, from Belgium and the Netherlands east to the Caucasus (Wikipedia). Its white-spotted, heart-shaped leaves and early-spring flowers — opening pink then aging to blue-purple as petal pH shifts — make it one of the first-blooming shade groundcovers in the garden. It thrives beneath deciduous trees in humus-rich, consistently moist soil and is reliably hardy through zone 3. The honest catch: in heat, drought, or poor air circulation it collapses into disfiguring powdery mildew mid-summer, often leaving the foliage blackened and unsightly until new basal growth re-emerges — siting in cool, evenly moist shade with good airflow is not optional.
Educator packet
Plant packet
Great Masterwort educator packet
Great masterwort is a clump-forming herbaceous perennial native to the mountain meadows, grasslands, and forest clearings of central and southern Europe (the Pyrenees, Carpathians, and Balkans) and east through the Caucasus to Anatolia (Wikipedia). Its distinctive pincushion flowerheads — a dome of tiny florets ringed by papery star-shaped bracts — bloom from June through September in white, pink, and deep red tones, making it a long-season cottage-garden favorite. It performs beautifully in cool, evenly moist sites with partial shade. The honest catch: Astrantia is a cool-climate specialist that sulks badly in hot, humid summers — in zones 7b and warmer with heat-laden summers it loses vigor, fades early, and is prone to powdery mildew; consistent moisture is non-negotiable and drought even for a week can trigger early summer dormancy.
Scientific name
Astrantia major
Plant type
perennial
Hardiness
4a-7b
Light
part-sun, part-shade
Moisture
consistent
Spacing
18 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Great Masterwort (Astrantia major). Retrieved 2026, June 30, from https://plotwright.com/plants/astrantia-major
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
RHS Find a Plant
Botanical research database
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes