Northern catalpa Catalpa speciosa (Care, Characteristics, Flower, Images) 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 # How Long To Charge Juul First Time Battery Last How Long Does It Take To Charge Do You Have To Charge Juuls How Do You Know When The Juul Is Fully Charged