Heat Stress or?

[SixthEddie]

Few weeks into flowering, been really hot lately and I believe this is due to heat stress but need verification. Looked at all the problem solving guides and pest and everything and can't match it to one particular issue.

Help is much appreciated!

 

[SixthEddie]

Re: Heat Stress or....?

Seems to start with a browning on the middle vein of the leaves and then fades to outer parts of leaf and then yellowing starts to come in. Starts in middle of leaves.

 

[BigSmoker1275]

Re: Heat Stress or....?

Looks like a nute deficiency