after doing many seeds in the all-mix i have concluded that it is way to hot for most strains. if you have a hungry indica then go for it, but some of those less hungry strains can burnt out big time in the first week or so. eventually the roots begin to develope like mad and the plant will always recover. i have never had the all-mix kill a sprout, but it will give you some leaf tip burn. personally i like the all-mix for certain strains, but for most the light mix is perfect for almost everything. cheaper too.