I start using nuts on week two once clones start showing root growth. I use advance nutrients and do a solution of 1ml of each step per liter/quart of water. As far as watering goes in perlite ect. I water till I see nuts seeping from the bottom of pot you want at least 10% to flow through and sit in your pail for the plants to wick up. Also when cloning you want to keep your humidity very high for first two to three days and then gradually lower by raising your clone dome an inch or two each day I mist frequently my clones. I do minimal misting during veg and flower but be careful with misting if you don't have enough air moving it can cause more problems than it helps. Hope this helps if anyone has better method would love to hear but this is what works for me. Good luck with the grow.