Lower leaf problems

[alex10]

Can anyone identify a problem I'm having with both my photo plants?
Right is pineapple chunk, top is crit' kush, left is healthy leaf for reference.
Thought it was a N defiiency, but after a feeding it has not impoved at all. alot of lower leaves are dying off but everything else is green and healthy. Also notice the brownish spots on the pineapple chunk.

 

[Muddy]

Could be nutrient lockout caused by your pH being off. What's your pH reading?

 

[surffreak23]

What age are they?
I agree with Muddy, on the possible lockout due to a bad PH reading, could also be a CalMag issue with the rusty brown spots. Even if you just fed them, if there was a deficiency, it will take more than a day to recover and look completely normal.

 

[alex10]

Thanks for the replies,
both are about 6 weeks,
12/12 from seed,
canna terra soil & nutes

pH is from test drops, will be getting a digital meter very soon!
My tap water is 7.2
Runoff pH is 7.4-7.6

 

[surffreak23]

That is way too high for any medium, even soil....
Here is a good PH chart to follow, notice that one side is for hydro the other, soil.

 

[JM]

this will also help...a good read:

https://www.autoflower.org/f7/self-diagnose-your-plants-basic-deficiencies-list-11.html

and get that ph down to 6.3 - 6.5 for soil mediums and 5.6-5.9 for hydros...

 

[archaiclife]

What nutrients and medium r u useing?