Had some 6400k HO T5's about 5 inches off the plant during early veg, she didn't like it at all. Leaves yellowed from the heat. I Swapped out the T5's for my viparspectra P2500 at about 25% power at about 18" over her. She was being vegged with 3 other girls. She also suffered from nitrogen toxicity within the first 2 weeks of veg, as I over did it on nutes (forgetting that the soil was already hot) so her first few true leaves were dark and clawed. A ph issue also occured as my ph pen was in storage for a few weeks between moves and needed recalibration. That could of also lead to the yellowing of the leaves.. She is in a 3 gallon fabric pot folded down to the handle stitching; so she is in about 2.5 gallons of soil. The medium is Fox farms ocean forest. She has since bounced back after the corrections were made. The "veggie" fox farms was also administered as a dry amendment on top of the soil 1 time a week...I used the small scoop and spread it around the outer portion of the soil bed by hand.