According to J.Eschman the best trumpet gentian to grow, very adaptable. Extra large, intense velvet-blue, upward facing trumpets. The main blooming season is spring but they can re-bloom throughout summer and fall. The leathery foliage is evergreen. For any good garden soil, needs light shade in hotter regions. 2 3/8" square - 3 3/4" deep pots - blooming size.