Are my bird of paradise plants sick?

Cupertino, CA

Multiple of these that are planted away from each other look the same. Can't really tell what's happening. They all start as bright, orange flowers but later develop black spots. Any idea what's happening? -Jane

Thumbnail by mommy_jane
Cleveland,GA/Atlanta, GA(Zone 7b)

It's difficult to diagnose plant disease by small photo but botrytis is a strong contender given your location and the humid weather. I suggest spraying with Daconil, a general purpose fungicide, as directed.

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