Oasis cubes, propogater tray w/high clear cover, heat mat, cool lamps like one 24" cheap Gro Lux flouro, drop your seeds into the open hole already in the cube, leave it open, don't compress it around your seed or cutting, (pre-wet the cubes before use), place in the prop. tray, pour tap water in so the cubes are kept damp, not drowning, cover, place on heat mat, put lights right down to the cover, keep damp, your in biz. You can safely leave these for a few days at a time if you just dump in enough water to keep them damp while you are gone. Don't ever let the cubes get dry! D'oh! You want humidity to make condensation on the inside of the cover and things will pop almost before your eyes. Keep them (cuts or seedlings) damp and let the roots grow till they are popping out all over the cube! This way you never touch the plants, they will grow tough and bushy inside the cover and should be nice and healthy when it is time to transplant. When you are ready and there are roots showing on all cubes, transplant them into your final grow medium, place them deep into the medium in case they are long and stringy, keep watered, low dose nutes right away if hydro (plus you may have to top water for a few if hydro). Keep the cover on the tray the whole time you are letting roots grow, opening occasionally to dribble in some water. Don't worry about putting them under a fan until transplanted.
Oasis® Horticubes Order a sheet of these cubes, break off a couple, buy some tomato seeds at the store, practice with them. They won't make roots quite the same as "Nirvana's" but will give you some practice placing the seeds and watering them to germinate properly. It is so easy! Good luck!