Help identifying deficiency

[asdfdsfsa]

Been trying to understand what my plants are telling me but I'm still unsure. Here are leaves from two different plants. They only appear on the bottom part.

 

[raratt]

This has helped me in the past.

 

[asdfdsfsa]

This has helped me in the past.

Yeah I've tried using charts to identify the problem but none of them looks like the left leaf on my picture. I first thought it could be sulfur since the veins are turning yellow first but like I said this only shows on the bottom leaves.

 

[raratt]

I understand, so many problems are similar. If those leaves aren't getting light the plant will shed them.

 

[Jypsy Dog]

With no info on your grow... Look at Mg. And save this book.
http://catnews.org/FREE Pot Books/Marijuana Garden Saver [2005].pdf

 

[Jypsy Dog]

Yeah I've tried using charts to identify the problem but none of them looks like the left leaf on my picture. I first thought it could be sulfur since the veins are turning yellow first but like I said this only shows on the bottom leaves.

NOT SULFUR

 

[raratt]

I have a similar problem except it has spread to the upper leaves, CalMag was recommended so I added that and I am awaiting the outcome.

 

[myke]

NOT SULFUR

no,that would be seen on new growth not older leaves.
looks like it started in the middle and its going outwards,thats a clue. Mg usually strts outside and moves in .

 

[asdfdsfsa]

I have a similar problem except it has spread to the upper leaves, CalMag was recommended so I added that and I am awaiting the outcome.

Let me know how it turns out, I've been using cal mag but only in small amounts.

 

[asdfdsfsa]

Also, could it be related to pH?

 

[Beachwalker]

Also, could it be related to pH?

IDK, why don't you drop a hint about your pH and maybe you medium for starters and maybe we'll find out? Picture of the whole plant too

 

[raratt]

Also, could it be related to pH?

Typically people want to know all the particulars: soil or hydro/pH/temps/humidity/light/ and a plant picture in normal light, not under blurples.