Yellow leafs purple stem (not genetics)

It’s ether N deficiency which is a lack of nitrogen which can easily be fixed with just adding some nitrogen to your fertilizer a lot of people make this mistake during the flower stage I know your plant needs a lot of magnesium and phosphorus during the stage but it also needs nitrogen just not as much as veg My second diagnosis would be S deficiency S deficiency is sulfur you can treat S deficiency by lowering your pH to 5.5 to 6 add in organic sulfur to a fertilizer That contains magnesium sulfate Epsom salt is a great source of magnesium sulfate have used Epsom salt to fix my plants in the past it works great hope this helps

Hey there Fungi, i gotta disagree with Mota on this one : this is K deficiency, you can tell from the colorful splotches on the leafs as well as the purple stems. When plants flower, they just need more K, so they start cannabalising themselves. Try to find some K somewhere, maybe a banana peel based fertiliser ? Hope this helps ! 🚀

Buenas compi! Esto tiene mas pinta de ser deficiencia de nitrógeno, cuando es fósforo se ponen con manchas más marrones. Te aconsejo echarle un poco mas de nitrógeno en nutrientes porque si no seguirá poniéndose amarilla rápido. En el info no pone a cuanto tienes el PH pero en flora debería estar a unos 6.2 eso ayuda a absorber los nutrientes necesario en esa etapa. Todo lo superior se ve bien la verdad. Mucha suerte! Buenos humos!