Pruning hairy violet encourages it to grow more vigorously by redirecting energy to healthy shoots, which promotes robust growth. Regularly trimming hairy violet helps maintain its desired shape, enhancing its ornamental appeal in the garden.

Pruning hairy violet during late spring and early summer aligns with the post-flowering period when the plant has completed its main flowering cycle, typically in early spring. This timing prevents the removal of buds that will become the current year's flowers, ensuring that hairy violet's blooming potential is not compromised. Additionally, trimming at this stage allows the gardener to shape the plant and encourage new growth while the plant is still in an active growing phase but after the risk of frost has passed, contributing to hairy violet's health and vigour. It also offers an opportunity to remove any dead or damaged foliage that may have occurred over the winter, minimizing the risk of disease and pests. Trimming in early summer, shortly after the first flush of growth, can also invigorate hairy violet for a potential second bloom in later summer or early autumn.