Plant library · Shade Trees
Catalpa speciosa
Catalpa is a fast-growing shade tree that reaches about 60 feet tall and 40 feet wide, creating a large, deciduous canopy for generous open ground. Its huge leaves and showy white flower clusters give it a bold presence from late spring into early summer. The long seed pods, broad foliage, and spreading crown make this a tree for a substantial yard rather than a tight planting bed.
Use catalpa as a single canopy tree in a lawn, at the outer edge of a large property, or where its shade can extend over open ground. Keep its eventual canopy away from small patios, vegetable beds, narrow side yards, and low plantings that will need sustained sun. Place it where fallen flowers and pods can be collected without interfering with daily circulation, rather than directly over a primary walk, drive, or seating area.[1][2][3]
Space catalpas 35 feet apart, center to center, when planting more than one. A mature crown can span about 40 feet, so allow the canopy to develop into open air rather than pressing it between buildings or other large trees. Reserve a broad root-zone area around the trunk, and keep a workable route from lawn or path to the tree for seasonal cleanup and any future pruning access.
Give catalpa a full-sun position for the strongest fit with its large shade-tree role. Moderate moisture suits it well, with room to water during establishment without turning the area into a heavily irrigated bed. It adapts to a range of soil conditions and can handle both moist low spots and drier, poorer ground, though moist, well-drained loam is a favorable setting.[1][2]
White flower clusters arrive in late spring to early summer, followed by long green pods that mature and persist into the colder season. Plan the ground beneath the tree as a flexible mulch or lawn zone instead of a fussy display bed, since flowers, leaves, and pods add seasonal debris. The canopy is deciduous, leaving more light available below after leaf drop.[1][2]
Leave extra clearance from structures and high-use areas. Mature catalpas can develop an irregular, coarse crown, and their branches are relatively brittle, so a site with open lateral room is more forgiving than a confined corridor. Large leaves can be damaged by wind, hail, insects, or disease as the season progresses; avoid making the tree the sole focal point beside a formal entry or carefully groomed terrace.[1][2]
Editorial content updated 2026-07-20.