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Depending on your lights(sorry if you stated) , most plants need more cal-mag than they get from typical potting soil, whether it’s Fox Farm, commercial supersoil etc. it’s reasonable to supplement and much more so entering into flower. I’m no expert, but my experience has always been to avoid needing to chase a deficiency.Thanks for the input I really appreciate it. I would hate to try to correct an issue with cal mag and then cause an N toxicity so I will go ahead and follow your advice to get a calmag without N in it (let me know if you have a brand in mind). Should I start supplementing calmag across all the plants or just 4AM?
You can always post a pick or two in the infirmary thread and ask those who have decades of experience.