Gensing Grafted Ficus trees embody strength, with substantially exposed root systems that support sturdy, thick-based trunks. Grafted branches display full clusters of compact foliage and glossy, oval leaves. The Ginseng branches are grafted onto a root stock of a ficus tree. These indoor bonsai respond to a wide range of light conditions from a sunny window to a brightly lit corner. This tree can be kept indoors year round, but will also thrive outdoors during the summer months. When temperatures drop below 50 degrees, it should be brought indoors and placed in areas that get plenty of sunlight. This tree can never be allowed to freeze.