Yellowing of plants

My three plants (AK-48 ) are about a week into 12/12. I vegged them for 6 weeks and intend to flower for 6 weeks.

However, the two bigger plants seem to be having some deficiencies. The three pictures below are of the worst one. The bottom leaves are yellow and the tips of the new growth are yellow.

DSC05896.jpgDSC05897.jpgDSC05898.jpg

The pH levels should be correct (maybe a little high at 6.8 ). Any ideas about the most likely cause?

Root-bound? I can see a couple roots coming out from the holes I cut for drainage, but I have read this is not a guaranteed indicator of being root-bound.

Fertilizer deficiency? I have not fertilized recently but gave them maybe 5 inches of new slow-release soil during a transplant a couple of weeks ago that should tide them over for a few weeks.

Also, considering their size, am I going to have to transplant to a bigger container further into flowering?

 

blaze530

Well-Known Member
it may be thos slow release soil with what your putting in, what i mean is they might have kicked in now and the pH for what i know 6.8 is kinda high i think its 6.5 not sure since your using soil
 
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