Pruning tiger lily helps stimulate blooming, encourages robust growth, and maintains an aesthetically pleasing form. This careful trimming can lead to a healthier, more floriferous plant.

Pruning tiger lily in early spring is recommended because it is just before the start of the growth cycle. This ensures that any damaged or dead parts removed will not take away from the growing energy of the plant. By tidying up the plant before new growth begins, the gardener ensures a neater appearance and healthier plant development. Conversely, pruning in late fall is also acceptable as it corresponds to the end of the growing season. During this time, tiger lily has typically finished blooming, and removing spent flowers and stems can prevent the spread of potential diseases and pests over the winter. It also helps in shaping the plant and preparing it for the dormancy period. However, it's important to avoid pruning when the plant is actively growing or flowering, as this can stress tiger lily and reduce blooming.