Trichome.Kid said:Could be magnesium deficiency.
I'm not sure if we're allowed to post links here.. Otherwise I'd post the site where I got those pictures from.
A small dose of epsom salts might help.
Simpleton said:When the 6 topped plants were in the 4" containers I gave em a very light dose of fish emulsion and the normal molasses/karma water. They reacted a little to those nutes by showing this yellowing so I moved them out of the 4 inch and into the 1 gallon containers.
When first placed into the Supersoil/perlite mix they looked like they were gonna take off. But growth has been slow. The yellowness is pretty much isolated to the older leaves that developed while in the 4" containers. All new growth is pretty much green but still slow.
I did not add any lime to this mix just supersoil outta the bag mixed with perlite. I am thinking that initially the nutes may have been a little strong and they didn't like it. And secondly, the mix they were moved to didn't have a stable ph and is what is contributing to their present growth rate/conditions.
I have oyster shell lime that I mixed into the flowering mix. I transplanted the untopped clone into this mix to check for nute strength. Even under fluorescent lighting the plant looks great and is showing no signs of overfert probs.
I really don't want to move these topped clones into this flowering mix as they have only been in the gallon pots for a little over a week. I am thinking the roots are not distributed throughout the pot and may incur damage by a transplant. I think I could be careful enough to do the transplant.
But...
What do you think?
Like I said, I don't see any potassium in you mix. Try adding some Maxicrop or Cal Mag Plus.