Ilex glabra leaves turned black and dropped in one day
Ilex glabra is such a nice selection, a beautiful plant. I'm sure you're disappointed with the symptoms you've observed recently! The blackened tips, loss of leaves, and overall decline does suggest to me that it might be getting too much water. We've had consistent rain thus far this season, and if you're providing additional water and/or the site is not adequately drained, it' s possible it is suffering from too much water. If you decide to dig out the plant, evaluating its roots will help to determine cause too. Are they healthy looking (nice and loose and/or whitish in color) or not healthy (tightly wound and/or brown, black, sometimes smelly), often from too much moisture. I hope this helps.