Are the leaf edges brown and ragged because a pest has chewed on them?
It doesn’t seem to be recent pest damage. Those ragged edges start off very small as rows of “cuts” when the fan is still below ground. As the fan grows, the damage grows along with it rather like when you carve your initials into a squash when it is small, and they enlarge as it grows bigger. We’re currently working to find out what causes the “cuts”, which may well be a pest but the damage occurs long before you actually see it.
