I have some clones in rockwool in a propagation tray. They have been in there for 11 days and still don't show any roots. I wondered how wet the rockwool should be? The rockwool is pretty saturated with water. Can you have too much water in the rockwool? Should I be seeing roots by now? The clones look healthy and I give them 18 hours of light from a grow light. What am I doing wrong????? Please help!!!!!