How far is your light source? Might be too heated in your area. Too, overwatering. If leaves curl up, turn yellow/brown, too much fertilizer! I know a lot of folks out there buy special (expensive!) 'nutes'....remember, it's a weed!!! Soil or hydro set up? If it's not in seedling starter mixture, it should have enough nutrients to carry through, lightly fertilizing. If soil, water when top 1" soil is dry, but damp underneath. If hydro, cut back on nitrogen or your "grow veggie" solution, make sure pH is stable. Hope this helps!!