Pruning oval-leaf sedge encourages vigorous growth and helps maintain its desired form. Regular trimming allows for rejuvenation and keeps the plant looking tidy and well-shaped, ensuring optimal health and aesthetic appeal.

Pruning or trimming oval-leaf sedge in the early spring is advantageous as the plant prepares for a new growth cycle. This timing aligns with the onset of warmer temperatures, which stimulates new growth, allowing oval-leaf sedge to recover quickly from pruning and direct its energy into producing fresh, healthy foliage. By trimming before the spring growth spurt, dead or damaged foliage is removed, minimizing the risk of disease and pests, and giving the plant a strong start to the season. Alternatively, pruning in winter, when oval-leaf sedge is dormant, is also beneficial. During dormancy, the plant's growth and metabolic activities slow down, reducing the stress caused by pruning. This timing ensures that the plant does not waste reserved energy on parts that will be removed, and it allows for a clear view of the plant's structure, making it easier to decide which parts to prune. Moreover, since oval-leaf sedge does not produce significant flowers or fruits, pruning can be done without affecting its ornamental value during these periods.