i just put my seeds in rockwool cubes and wwas wondering how long (about) does it take before i see something sprout out the top? i know it can take anywhere from a day to a week for a seed to germ but about how long before i actuallt see something sprout through the rockwool? Also how often do you water them? i hear see how heavy they are when wet then when you check them and they feel lite then water them but i have them in a prop tray so i cant pick up the cube to see how heavy it is. should i just touch the top of the rockwool and if it seems dry water them?