Native Range: Eurasia, mountain regions of Korea, eastern Russia, China and Japan.
Hardiness Zone: USDA Zone 3a: to -39.9 °C
Soil: Humusy soils. Tolerate clay soil
Light: Part shade to full shade
Flowering Period: July - August
Garden locations: shady areas in a native plant or wildflower garden, woodland garden, rock garden
Price: 5 €