northern catalpa (catalpa speciosa)

northern catalpa is a showstopper among hardy shade trees. native to the midwest but widely planted across the northeast, it’s known for its oversized heart-shaped leaves, orchid-like white flowers in early summer, and dramatic dangling seed pods that persist through winter. at maturity, catalpa can reach 40–70 feet with a broad, irregular crown, making it as ornamental as it is resilient.

the summer flowers are fragrant and abundant, drawing in bumblebees, honeybees, and the occasional hummingbird. catalpa leaves serve as the sole host for the catalpa sphinx moth, whose caterpillars (“catalpa worms”) are a key food source for birds and fish. the long, bean-like pods that follow add dramatic winter interest, while the tree’s broad canopy casts deep shade. its oversized leaves fall in thick drifts but decompose rapidly, enriching the soil beneath.

this tree is remarkably hardy and adaptable. it tolerates poor, dry, or compacted soils, urban pollution, and fluctuating moisture levels. its deep root system makes it wind-firm and drought-tolerant once established. long used as a street and farmstead tree, catalpa thrives just as well in yards, parks, or restoration plantings. our catalpa seed was collected from tall, magnificent street trees in burlington vt.

beyond its ornamental and ecological value, catalpa has a history of utility: its rot-resistant wood was prized for fence posts and railroad ties, and it is famously associated with “catalpa worms”—the larvae of a sphinx moth—which are a favorite bait of southern anglers.

planting notes

• height: 40–70 ft
• soil: adaptable; tolerates clay, sand, and poor soils
• light: full sun to part shade
• growth: moderate; long-lived once established
• wildlife: nectar for pollinators and host plant for catalpa sphinx moth