Catalpa bignonioides ‘Nana’, also known as a dwarf Indian bean tree, has a rounded crown with large, bright, green heart-shaped leaves that turn buttery-yellow in autumn. This tree loses its leaves in winter. It will reach a height of 2-2,5 m. So it’s suitable for gardens with limited space.
How and when to prune Catalpa bignonioides ‘Nana'( Dwarf Indian bean tree). This tree can be pruned every year at the end of November or in early spring. Cut back all branches to about 10-15cm above the graft (the point at the top of the standard where all the branches arise from).
Alternatively, prune ‘Nana’ every two years to maintain the shape of the tree.
Dwarf Indian bean tree Dwarf Indian bean tree after pruning
Where to grow
Catalpa bignonioides ‘Nana’ is best planted in full sun, in a position where it’s sheltered from strong winds. It prefers well-drained soil. Before planting incorporate lots of leaf mould or garden compost in the planting hole.
A container-grown Catalpa bignonioides ‘Nana’ can be planted during most of the year. Postpone planting when the weather is frosty.