How to Prune white asphodel?
Although you can cut back flower stems after flowering the seedheads are attractive so can be left

white asphodel · Asphodelus albus
Also known as: rimmed lichen; white-flowered asphodel
Grow in moderately fertile, well-drained soil in full sun. Can die back in heavy, poorly-drained soil
Although you can cut back flower stems after flowering the seedheads are attractive so can be left