Northeastern United States, Mid-Atlantic United States, Southeastern United States, North-Central United States, Central United States, South-Central United States, Canada
Eastern Europe, Southern Europe, Russia/Siberia, Southern Asia, Western Asia
Dappled Shade, Shady Edge, Woodland Garden
Hillside, Mountain Slopes, Temperate Regions
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21
6, 7, 8, 9, 14, 15, 16, 18, 19, 20, 21, 22