Rooting can take up to 3 weeks. Some strains are just finicky. 4 Days is the shortest time ive heard of. Did you dip them in the root hormone? cloning gel. Then try olivia's solution for feeding. Use a dome. and put an airstone in a glass of water in there. That worked for me. happy growing my young snappa ah and use a flourecent light my young aprentice. hahaha