Indian Bean Tree Gardening In Pearls Northern Catalpa Tree Seeds (Naturally Grown) Learn About Northern Catalpa Arbor Day Foundation Catalpa #tree #plants #foraging #ecopunk #insects While catalpa trees are not generally considered highly toxic, some parts of the tree, particularly the roots, are known to be poisonous according to the USDA Plants Database. The leaves and seed Catalpa Speciosa The Garden Lady