Hi Lapis. I used half of the amount of seeds I used before. I also keept the tray near the window to get sun and I didn't water it as much. I watered it more on some days and less on others. I had a small quarter sized amount of white mold in one corner of the tray. Right now I can't grow wheatgrass outside but when I move, I'm going to grow wheatgrass outside. The light interests me but I'm trying to get away from using electrical appliances to save money and get a little more independent.