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- #661
N420
Well-Known Member
Ok thanks Mr.S! The Cal mag I have isWith the MC you can increment 10% at a time. So you could have gone to 6.6g but that's too high until you can see how they react.
I would still bump it up to 6.3 or 6.4 and add some calmag. The fact it's yellowing and working it's way up is a lack of N this early. Maybe a pH problem but 5.8-6.1 is ideal. The upper could be a Ca def under the LEDs.
Adding that extra little bit of MC I don't think is going to fix the N issue which is why I think calmag will help.
3-0-0 is that an ok ratio to mix with mega crop? I think I read somewhere you recommend a cal mag of 1-0-0