Ole Jonny Larsen is a school specializing in rhododendrons, and has an extensive selection with over 400 varieties. The school offers plants for sale, both through mail order and locally. In addition, Ole Jonny Larsen has published a new and expanded rhododendron book that mentions 450 different species, which may be of interest to both garden enthusiasts and professionals.
Ole Jonny Larsen also writes articles and books about plants and garden history, and gives lectures that deal with various topics related to gardens and plants. The garden is open for visits by appointment, which gives the opportunity for direct experience with the various plants. The location on the Norwegian west coast provides a favorable climate for growing plants, which can contribute to a varied and rich garden environment.