Choose from northern catalpa (Catalpa speciosa) or southern catalpa (Catalpa bignonioides), depending on your region. These trees are covered with beautiful white blooms in May and June when many ...
The northern catalpa is hardy in Zones 4 to 8, and the southern catalpa in Zones 5 through 9. Both trees are native to parts of the U.S. and are occasionally attacked by the larva of the catalpa ...