Outdoor plants are yellowing, is this anything to be concerned about?

[blaeky]

I have some autoflowers that are pretty late into flower. Grown from seed outside in soil and I've been using pure blend pro for the whole grow. I'm getting some black spots and yellowing leaves. I trimmed a good amount of them off but it seems to be spreading slowly, is this just normal leaf fading? I keep the PH between 6 and 7. I use city water I take from work to water half the time, the other half I use our well water that is pretty alkaline and has a lot of calcium.

 

[Imzzaudae]

Hello. Nothing to worry about at this stage. I'm thinking the blotches on the fan leaf is a little light on the calcium.
Next year do this 30 days before you put in your autos.

The brown spikes on the edged of the leaf looks like maybe a little heavy on the nitrogen a while back.

Plants are well into flower. Ease up on the nitrogen and feel something l like a 5-15-5 Let them finish up.
Nice Job!