This rhizomatous Begonia hails from Sumatra and is easy to grow. New leaves are red, and keep a subtle red edging when mature. The leaves are very soft, and sort of shimmery. The internodes are short, so it’s appearance remains compact. I’ve been growing it in 100% clay but I think it would do well in many other substrates. Begonias.org suggests an addition of bone meal, with a light porous primary substrate. It does well in temperatures in the 70’s and will sometimes lose leaves if kept too cold.