How to prune catalpa speciosa

Late winter to early spring while dormant, or late summer. In the first 3–5 years, select a strong central leader and remove competing upright stems. On mature trees, remove dead or damaged limbs back to the branch collar. Use a pruning saw for larger cuts; seal large wounds only if in a disease-prone area.

Formative pruning for 3–5 years; then every few years as needed. Catalpa speciosa (northern catalpa) is a large, fast-growing tree that generally needs minimal pruning once established. Formative pruning in early years creates a strong, well-spaced framework. Mature trees need only removal of dead, diseased, or crossing branches. Unlike its cousin C. bignonioides, it is less commonly pollarded and is better appreciated as a full-sized tree.

In the first 3–5 years, select a strong central leader and remove competing upright stems. On mature trees, remove dead or damaged limbs back to the branch collar. Use a pruning saw for larger cuts; seal large wounds only if in a disease-prone area.