Quote Originally Posted by sneekymofo
Hmmmm....could be a lot of things at this juncture. What's your pH in the cubes? What process did you use to ready the RW? What kind of lights are you using at this stage? How about heat / ventalation? These details might help diagnose....
My pH is about 5.6 im using the General Hydroponics test kit with the GH up and down. I started them in a 6 pack starter plug medium suggested to me by the guys at HTG Supply. Im using the HTG Supply T5HO 4ft. Fluorescents with two blue spectrum grow bulbs in each of the 2 ballast. I am currently running them 24hrs per day. Heat stays around 70 - 74 degrees. Ventilation is simply an 18" Oscillating fan (there's only 4 plants so I didnt really see a huge need in a big expensive ventilation system) I let the plants germinate in the 6 station starter plug medium for about a week and a half before transferring them into the rock wool that had been soaking in a pH of 5.5 for about a day and a half. This was two days ago.

Quote Originally Posted by goosie
MMmm....what soil did you use? did it have slow release fert in the soil? if so have you been feeding them as well? and how often are you watering?
Looks to me as if its nute burn or over watering?
Just my opinion mate.
id not water them for 2-3 days.
The same kinda thing happened to me and it was due to over watering

Hope they turn for the best for you.
Its very possible that I am over-watering. Ive been watering once a day everyday. Im not using any soil and I have not fed them ANY nutrients. I simply Put the seeds in the starter plugs and watered them. They were looking GREAT until I put them in the rock wool now they're starting to yellow.