idk where these people get off giving people bad info. its obvious these asses dnt have a clue what theyre talking about. if u dnt know the answer, dnt comment.
1st of all, u dnt need to give seedlings ANYTHING for the 1st couple weeks, except maybe a little calmag to buffer ph. NO NUTES. purple stems are nothing to worry about at this stage. purple stems could be genetic, and a plant could always have them.