BURNING BUSH LEAVES COMING IN FROM THE BOTTOM UP, NO LEAVES AS YET ON TOP BRANCHES
WE HAVE HAD A TERRIBLE WET CLOUDY SPRING. ALL THREE OF MY BURNING BUSHES ARE GETTING LEAVES ON THE BOTTOM AND IN BETWEEN BUT NONE ON TOP
Certified GKH Gardening Expert
It will be hard to say without a photo, but it could very well be a fungal infection.
It is a good idea to trim off any growth that is completely dead, or brown, and treat the soil with a HANDFUL of DOLOMITIC LIME and a TABLESPOON of WETTABLE SULFUR per plant. This will condition the soil, and prevent infections during wet seasons.
in the meantime, this article will help you to care for these shrubs: https://www.gardeningknowhow.com/ornamental/shrubs/burning-bush/burning-bush-care.htm