I was thinking it was genetics. They are still seedlings (First grower, from what i gathered, the seedling stage isn’t over until I have a set of 7 pointed leaves) and that one leaf grew out lighter from the beginning and cal mag hasn’t done anything (just a preventative amount was applied once every day for close to a week). Also, I got them from a website im not even too sure about anymore lol my initial thought was they sent me a seed with down syndrome.