Pruning devil's trumpet encourages more abundant blooms and aids in preventing infestations of pests and diseases by removing dead or unhealthy tissue, thus maintaining plant vigor and appearance.

The early spring is deemed ideal for pruning devil's trumpet due to its emergence from dormancy, which leads to rapid new growth. Pruning at this time allows the gardener to shape the plant and stimulate healthier, denser growth just as it is gearing up for its active season. Removing any dead or damaged branches early in the year prevents disease and allows the plant's energy to focus on producing new, healthy growth. Late winter pruning is also suitable as the plant is still dormant, reducing stress and potential damage to the plant. This timing helps ensure that wounds heal swiftly, decreasing vulnerability to pests and diseases, and results in a vigorous resurgence in the following growing season. Pruning during these seasons helps maintain the plant's structure, facilitates light penetration, and supports the natural life cycle, promoting abundant flowering or fruiting.