Gardenia tubifera, also called golden gardenia, is a species of flowering small tree in the family Rubiaceae, native to Asia. It is a small tree, growing to a height of 2âÂÂ4 m (6âÂÂ12 ft) high with a spread of 1âÂÂ2 m (3âÂÂ6 ft). It prefers tropical conditions and will not tolerate temperatures below freezing.