Gorilla Grow Auto 12 days from popping the soil. I'm using Miracle Grow Soil! I know most people wouldn't suggest it, but if you watch your plants and don't give them any nutes for the first 12 days or so, you should be alright. I'm using "Tangs Easy Feeding Schedule" but because I'm using Miracle Grow Soil I just did my first feed with half of what Tang suggest because of course the soil already has nutes in it! Like Tang says, if your leaves are looking pale up the nutes. If the leaf tips are yellowing, cut back on the nutes. Important thing is watch your plants! You'll hear from me in a week or so!Peace!