Gunnera problem – leaves turning brown and holes appearing
My gunnera is either being eaten by a pest, or has a disease. Any ideas from these photos?
It has been fine in previous years, but this year I've had to cut 5 or 6 leaves off as they'd turned totally brown and were covered in holes.
Even some of the young leaves are already dark underneath (see pics).
I've been spraying it with Neem Oil now and then as a pest deterrent but it doesn't seem to make any difference.
Any help would be much appreciated.