Do i have some nitrogen toxicity?...

This does not look like N toxicity to me, either--there's no tip burn or clawing. Way to go with the organic/no till etc.! To me, this looks like a minor Magnesium deficiency (purple stems and slow growth), or it could be over-watering, or it could be a nighttime temp issue. I'd recommend adding a low-dose basic Cal/Mag to your waterings. I bet that would help a lot, but with all the effort you've put into the organic/no-till approach here, I certainly understand if you don't take that advice . . . All the best with the rest of your grow! Great work!

Your leaves aren't really dark green , I mean it's more an healthy green than a dark green and you leaves aren't clawing which is a main sign of N toxicity. So no clawing , no dark green and no N toxicity to me. There is maybe something related to the genetic as I can also see many "3 fingers leaves" and some "4 fingers" which is a variation that I've rarely seen. If you take a look the her photoperiodic parent the Frisian due you will sometime see that kind of variation and if you click on the description on GD you will see others peoples pictures with distorded leaves too.