Blueberry Problems

Hey there are dark brown spots on my blueberry's large lower leaves. What are they? These are about 5 week old plants. Sorry about the poor photo.

My blueberry plants take next to no nutes. They are very sensitive. Do you mist them. It could burn from that or nutes hard to tell from the pic.

look at the spots closely. are you seeing any red, rusty gold color? if you do, you could have rust. usually a sign of poor air circulation/exchange.

They do not look red. A little gold maybe? And I do mist them, only with water though.

More pics!