In addition to what Zandor said, sprouting the seeds in a different media, like a small rockwool cube you can bury in hydroton later, gives you the option to bury a lot of the stem when you transplant.
I always bury mine right up to the cotyledons, because that part of the stem has the potential to grow a lot of roots, and roots are GREAT.
stinkyattic Reviewed by stinkyattic on . Many Questions? Ok what's up everyone the first question is can someone tell me if these seedlings are stretching too much?(pic below they are about 7 days old nirvana's misty strain. I'm also setting up tubs for the vegging area I'm sqeezing about 20 in each 2x3 tub I think they are 55 gallons, 3 inch netpots. I want to set up tubs for the flower room which is bigger so I want to put them in bigger tubs with 6 inch net pots. Is it possible to switch pots in dwc. Or can I just ride it out in the 3 inch pots. Rating: 5