Issue resolved - stunted growth/yellowing leaves/veinal chlorosis/appearance of nutrient occurred after plants became root bound in 4 gallon pots. Plants have since responded well to transplant into 7 gallon air pots and seem to be back on track.
Looking for help from the community to diagnose a few issues arising week 7 from seed. My issues are yellow new growth, chlorosis near veins/purple veins on a limited number of fan leaves, and stunted growth. Photos below ... would be grateful for suggestions.
Your pale green leaves looks like a Nitrogen deficiency.
So you are listing everything that is going wrong but you're not explaining with which nutrients you are feeding ? at which dosage ? how often ?
A good N shot idea ; Piss in a bottle ( piss is full of N ) then add 2x the amount of piss in water and water your plants ( you can ph'd it but clean your ph pen after ) , you will see the changes withing a week. I know it can sound "dirty" but since the quaranteen I've savec my tobacco crop with piss and DIY nutrients
Greetings from Russia! Your Plants look great! Keep developing in the same spirit! If you are interested in following the adventures of weed in Russia, subscribe to my diaries.