hi, we used Botanicare Pro Blend Gro and Bloom on one grow until we discovered the blue mountain stuff. it's all organic, little to no chance of plant burn when used according to the directions. we've used it A LOT. now we used almost every time we water. just at a very diluted solution. typically 1/4 to 1/3 of the recommended. Last two weeks its only water and molasses. with Auto's you have to be careful as the life of the plant is so short. Frist three weeks, nothing but the FFOF soil mix. First hit of BLO is at half dose. then water as i mentioned above until the last two weeks. molasses and water. we use five gallon buckets for our Auto's. Found that you get a much more robust plant and yield. I read about people getting a 1/2 oz and they grew it in a gallon bucket or 1/2 liter soda bottle and just think WTF. bigger is usually better.