Elm Bonsai Trees require sunlight and though can be adapted to an indoor bonsai with artificial light or placed by a window which gets strong sun. Well draining soil is essential to the heal of the plant, which is why we use the premium lava rock, Akadama, Pumice and Pine back soil mix here on elms. includes 7" glazed ceramic pot with drainage holes. The Elm bonsai pictured is full of new growth and has been trained in an informal upright style. Elms arevery easily trained and tend to be hardier than other semi deciduous varieties used for bonsai.