Pruning snow-white wood-rush encourages more robust blooms and vigorous growth. It helps maintain the plant's compact form, enhancing its garden aesthetics. Regular pruning ensures snow-white wood-rush remains healthy and visually appealing.

Trimming or pruning snow-white wood-rush during early spring is considered the most beneficial for the health and aesthetics of the plant. This timing aligns with the end of snow-white wood-rush's dormancy period and right before the onset of new growth, allowing the plant to recover quickly and direct its energy into producing fresh foliage. Moreover, removing any dead or damaged parts at this time can prevent the spread of diseases and pests that find refuge in weak plant tissue. Pruning before the new growth begins ensures that the plant's appearance is maintained without impacting future flowering, since snow-white wood-rush typically blooms in late spring to early summer. Early spring pruning also provides the opportunity to shape the plant and encourages denser growth throughout the growing season.