MrStinkyanswered grow question 3 years ago Looks like a few things going on there buddy:
Yellowing from the bottom upn- indicative on N def.
Purpling indicative of phosphorus deficiency (could be genetic but as the leafs are showing other deficiency symptoms I would say deficiency).
Top leafs clawing indicative of N tox but they dont look dark green enough - have you been flushing the plant to try and correct anything or did you add a high dose of calmag?
Looks kinda over watered too.
With your home mix organic nutes it is going to be difficult to fix, I would suggest getting some biobizz grow, bloom & algamic over the weekend, algamic for stress and chlorophyll reabsorbption, and grow and bloom for base nutrients - go at like 30-50% recommended dose for grow and bloom and like 2-3ml / L of algamic as it is low npk every watering - dont water to runoff with the organics or you end up dumping your nutrients out, maybe 2L of water every 3 days or so.
Are you pHing every time by the way? Could be wonky pH causing what looks like multiple issues. If you are pHing, did you calibrate your meter recently?