Is It Safe To Smoke Catalpa Pods Catalpa tree seed pods Buy Online No these aren't giant tree green beans, but instead the seed pod of the northern catalpa. These bean like pods can grow to be 20" long and contain numerous 1" long seeds. #haverfordcollegearboretum # Smoking caterpillar hi res stock photography and images Alamy Northern catalpa Catalpa speciosa The Morton Arboretum Is It Safe To Smoke Catalpa Pods Smoke Catalpa Pods Indian Bean Tree