Northeastern United States, Mid-Atlantic United States, Southeastern United States, North-Central United States, Central United States, South-Central United States, Canada
Mexico, Central America
Blue Ice, Eventide, Starfire
A. houstonianum f. isochroum, A. houstonianum f. luteum, A. houstonianum var. muticescens
Dappled Shade, Shady Edge, Woodland Garden
Sunny Edge, Woodland Garden
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 21
A1, A2, A3, H1, H2, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 20, 21, 22, 23, 24