Black spot in Zone 5

Black spot in Zone 5

'morning! ^_^ I think some of the hollies (ilex x meserveae, "Blue Prince & Blue Princess") I planted last fall are developing black spot. Aagh! I sprayed them with an anti-desiccant before winter, and wonder if that may have been a contributing factor? In any case, I was hoping for suggestions as how to treat them? Should I spray them with a fungicide? And which one should I use? Thanks!
My Jasmine wall

My Jasmine wall

My Room!

My Room!

What is this flower called?

What is this flower called?

Peruvian Daffodils

Peruvian Daffodils

rooOom

rooOom

Water plant ID

Water plant ID