Leaves turning yellow with brown spots

[Cwgsc]

It's week 2 into flowering on my autoflower girl scout cookies and for some reason the bottom leaves have started to go yellow with brown spots aswell the tops of the plants seem fine so think I can rule out heat stress so really not sure what it is

 

[namvet25]

Looks like it could be a slight cal/mag def.What are you feeding her and have you used any cal/mag?

 

[Puddentane]

Tell us a little about your grow. Lights, soil nutes and watering program. These things will play a role on how you want to proceed.

 

[Waira]

-- can you get us whole plant pics? This will help diagnose,... I'd say this is mostly N defc. symptoms (paling out all over leaf) normal on the lowers at this stage; spots harder to say,..looks like it might be opportunistic fungal spotting on weak tissues,...what's your feeding sched' and brand?

 

[Whitetrash]

I know this is a super old thread. But I have 3 girlscout cookies from Autoseeds. 2 are about weeks from harvest and lookin super healthy. But the 3rd is exactly as described lots of yellowing with brown spots. Humidity is in low 50s they get green planet nutrients. Cal mag. Water ph at 5.8-6. Feed every 2 days. I have no idea what's goin on. The other 2 a perfect. This other one is behind by a couple weeks. Bigger as well. But yelliwing