Q.My Leucothoe keeps dying.
It doesn’t appear that it is insect related. I water regularly. I think it is a blight.
Leaves turn brown then stems die.

Certified GKH Gardening Expert
Do you know the pH of the soil? leucothoe cannot tolerate alkaline soil; it must be acidic.That and consistent watering are its critical needs. You can buy pH testing kits at any garden center. See if that is the problem.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/raise-acid-level-soil.htm
https://www.gardeningknowhow.com/ornamental/shrubs/leucothoe/growing-a-leucothoe-bush.htm