• Catalpa bignonioides
    Southern Catalpa

    Large, showy white, trumpet-shaped flowers bloom in late spring followed by long bean shaped seed pods. Trees mature with a short, thick trunk with brown to gray coloring that develops a rugged aged look making it a unique specimen for bonsai culture. Leaves are heart shaped and bright green and develop before flower clusters open adding much contrast to the beauty of the blossoming tree.

    The narrow crown is oval-shaped or uneven, upright with distinctively large, heart-shaped, bright green leaves and long, bean-like pods. Withstands wet, dry, alkaline soils and hot, dry environments, but prefers moist, deep soil. Sun or partial shade.


    Catalpa bignonioides Tree Seeds

    • Sowing instructions:
      Scarify the seed and soak in warm water for 24 hours
      Sow seed 3/4” deep at a soil temperature of 61-64° F. and keep moist
      Seed can be sown outdoors in the fall for spring germination
      Sow in standard good draining potting mix

      Plant Care:
      Grow in a standard potting mix
      Likes a deep, rich well fertilized soil
      Keep moist and feed once a month
      Transplant when large enough to handle into pots
      Keep humid if in dry conditions by occasional misting


      · full sun to partial shade is best; shade tolerant
      · moist, slightly acidic, well-drained, high organic matter soil is ideal
      · dislikes hot, dry locations
      · avoid windswept winter locations

      Landscape Uses

      · specimen plant, bonsai,
      · accent plant for artistic appearance
      · rock gardens
      · in mini-groves
      All seed descriptions are based on careful study, research and our own growing experiments. They are reproduced here, from our web site and seed company packet descriptions and are Copyright along with photos © [ Summers Seeds Garden Products] 1998-present. All rights reserved. No part of these descriptions may be reproduced, in part or in whole, without the written consent of the owner/publisher.