are the stems and veins yellow? if so add a tablespoon of Epsom salt per gallon of water till condition improves.. the plant might be lacking of protein do to the MG lack of soil nutrients. I would still recomend to check PH nitrogen and (P) before going off and buying the eptom. post a picture aswell so we can have a better idea.
Are you feeding them nutrients..? what kind and how much?
then its a nitrogen problem... can't really tell without pic.. but all signs point to N if the lower leaves are yellow and drooping... you need to add nitrogen like a tablespoon per gallon and plant should be fine after a week.
i wouldnt be to sure without a pic , hes only 2 weeks in i doubt its Nitro deff and also MG soil has ferts in at allready doesnt it ?
Yeah that's what I said.. need to see pic to be sure. But I've used MG in the past.. I bought 2 bags of MG.... I used up both bags for 4 clones in five gallon pots and the other bag to fill in the rest of the garden.. flowers, lemon tree, apple tree etc... I remember using up a full bag of MG on 3 pots and got a lil left over from the other bag of MG for the 4th pot. Funny how the other 3 clones lacked of nutrients when I tested the soil.. while the 4th clone I used from the left over bag of MG was neutral on NPK ... I guess it's always a 50/50 chance MG will come legit organically.