Any recommandations?

Cal/mag is not the solution to every problem! Don't defoliate. Don't over feed. Be patient and enjoy yourself. Write down everything you do so you can learn from your mistakes. 18/6 is optimal........NEVER grow at 24/0!

Yep,watch out when watering,al those spots on the single finger leaf are from water droplets after watering,the drops act like a magnifying glass under your lights and burn these spots in the leaf There is nothing wrong with your plant These spots will remain and don’t heal,just try to keep your lady dry when watering and she should be fine.you are probably gonna take that leaf off anyway in a week or so Other growth looks very good keep it up and she will do just fine Happy growing ✌️🌱

I correct burns are only at the tip of the leaf, that's calcium deficiency 💪

Hey, I'm still a beginner myself, but for me it looks like a lack of calcium or burns from the fertilizer I can also be wrong, but try some calmag Cannaapeace :)