Indian Bean Tree Gardening In Pearls Northern Catalpa (Catalpa speciosa) organically grown flower seeds. Floral Encounters. Polk Salad Annie A Pruning Guide for the Catalpa: When, Why & How? MOOWY Smoke Catalpa Pods Catalpa (Catalpa speciosa) The Northern Catalpa Tree Extension 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 pods