Young trees need consistent moisture, about 2.5 cm per week, especially during dry spells. Established Northern Catalpas are quite drought-tolerant and generally only require supplemental watering during prolonged periods of extreme dryness. Ensure good drainage to prevent root rot.

Prune Northern Catalpas in late winter or early spring while the tree is dormant, before new growth begins. Focus on removing any dead, diseased, or damaged branches to maintain tree health. Also, address crossing or rubbing branches to prevent future issues. Light structural pruning helps maintain a strong framework and improves air circulation within the canopy. Avoid heavy pruning, as this can stress the tree and encourage undesirable water sprout growth.

Northern Catalpa can be propagated from seeds, which require a period of cold stratification for optimal germination. Softwood cuttings taken in early summer can also be rooted, though success rates may vary. Ensure cuttings have several nodes and are treated with rooting hormone.

As a large deciduous tree, Northern Catalpa is not typically grown in pots for long-term cultivation. Young saplings grown in containers for transplanting should be moved to the ground when they are still manageable, usually within 1-2 years, to allow for proper root development.