my the leaves on the top of my plants are rolling up like you roll a rizzla paper they are nearly 4 weeks old been on 12/12 from seed under a 400watt hps in cheap multipurpose compost all they have had is epson salts and human urine due to my nutes getting lost in delivery! could thoose systoms be causeed by lack of nutes? they are yellowing now aswell i will have nutes tomorow but they look real bad :-(