Shitty pic(sorry) cant really tell? looks like could be overwatering? but not enough info to tell! are the tips of the leaves burt? what kind of light r u using? watts? what kind of medium u growing in? Nutes? ect..... the more info the better the diagnosis?......btw why is it all red in there?i got this plant growing with a heat lamp its abt a ft high and the leafs curl rite when they grow heres a pic
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your problem is the lamp....lol its too hot, plus i dont believe u r getting enough lumens for a "heat lamp"? but im not a veteran grower, so maybe you could but doubt it. watts? thats the wattage of your light ie 45,60,75,100,250,450,600,1000???? nutes r nutrients.... u know like gh( general hydroponics) AN( advanced nutrients??? heard of these? they provide your babies with the neccessay vitamins, food,yada yada. mediums are what u grow in, rockwoil soil ect.well the leafs are green and look fine there just curling and ya its a red heat lamp 250w and wat are nutes?. and mediums whats u mean? and sorry for the pic its all i got