Is this a case of botrytis or something else?

Looks like botrytis to me. Did you have any small hail early in the season? I see it's on the lower leaves which is pretty much non consequential because they're soon to be lost shorty after blooming, or least some will fall then anyway. As long as you have it arrested, that's the important thing.

I sprayed this on it





We have not had any hail that i know of. But i work an hour away so maybe something came through. Have had a decent amount of rain here. I had mulch pulled away. But last i pulled mulch up closer worth the 90 degree weather.

I have heard of a home made fungicide. "Bordeaux maybe Try that. Last time i sprayed, i sprayed every plant and the ground

Forgot to say thanks Lorn.

Anything else i can do? Spray it weekly. Is the stuff i got good enough?