I need some help with my deteriorating dwarf viburnums. We were advised these are florida native and drought/heat_ salt tolerant. We planted 70 as new landscaping in July 2023, we lost 3 shortly after planting but most seemed to take ok. In the past 1 month we have started to see browning and die back on random areas of many of the shrubs. Also we see some red/purple leaves which I think is normal for wintering. We have lawncare that has put down a root simulator agent in the past and also sprays as needed monthly for fungal/pest concerns. I also uploaded a photo of a very healthy looking one with lots of new growth. Please help. I don't want to lose them all!
