Old Uncle Ben
Well-known member
Well it's not a cal deficiency. Must be mag. Or nitrogen. Something tells me you'd say if you knew.
Uncle ben you've officially been added to the guru list.
Micros aka trace elements. Looking at the leaves suggests either Zn or Fe. Herein lies the problem with "bloom" foods, they usually induce micro deficiencies. Goes hand in hand with low N foods, another reason why I preach the use of a balanced food with a good micros "package" start to finish. By "balanced" I mean a NPK ratio close to a 1-1-1 or preferably a 3-1-2.
2nd, as folks throw stuff at their faves like epsom salts or CalShit per the usual forum mis-diagnosis, they don't know what to look for adding one thing or another exacerbating the problem. For example, Mg deficiencies start at the lower leaves working its way up mid level showing some chlorosis and/or the leaves going light/pale yellow. I see little, if any at all Mg chlorosis at IC Mag.
Micro deficiencies are always reflected in the upper level leaves.
For lack of having an example of cannabis chlorosis in my gardens past and present, here's a recent pic I took of some nasty chlorosis going on with my Meyer lemon tree. Since been corrected with Peters 25-5-15.
Greenhouse citrus got hit hard with spider mites too which will turn the leaves a pale green. Mites love cannabis. As an aside, picked 233 of this incredible fruit this year. Makes for some great lemon bars. We just made those bars today but using my Persian limes instead of lemons. 2 TB. of fresh zest makes them.
Good luck,
Uncle Ben