Quote Originally Posted by stinkbudd
I know with my gardenias, when their leaves look like this it's telling me it wants more iron. I don't know if it's the same with cannabis. I did folar feed her on Monday with epson salts. She doen't look any different. I am not sure if I should be folar feeding anyway since she is week two of flowering. I doubt its ggod for the buds. Should I try giving her more epson salts?
Why would you give epsom salts if you think your plant needs iron?
E-salts are a magnesium compound.

You know right that yellowing low leaves are normal in the flower time?
TOTALLY normal.
The lowest first, showing signs of N deficiency which is linked to and looks like Fe deficiency (good for you for having other plants to compare to!!! Yay, gardenias!).
Because when you switch to flower nutes you withhold Nitrogen.
This is normal, and it will get worse.
If you want to prevent it without messing up your flower cycle by giving the wrong ferts, mix a little fish emulsion into the soil before you transplant into the flowering pot. It will slow down the dying-off process fo the lower leaves.