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Catalpa Offers Bright White Blooms.

Catalpa (Catalpa speciosa) blooms with white, orchid-like flowers in late spring to early summer. The flowers are set against vibrant green leaves and followed by long, bean-like pods. Whimsical and eye-catching, these trees tend to grow quickly and can get fairly large, so be sure to give them the right amount of space to mature in. Catalpa is hardy in Zones 4 – 8.