I watch my seedlings - when they look like they are growing well, will take a look at the roots. If they fill the pot, I pot them up in a larger sized pot. Also use alfalfa pellets - that seems to really have given them a kick. Someone recommended Miracle Gro Shake N Feed, a time release fertilizer. That might work for you. Tommy Maddox, a very good hybridizer, has his seedlings growing in water ponds - if you have enough seedlings, a kiddie pool from Walmart works great. If that is too big, a plastic box would work. I water mine a lot, so they aren't in the water now, but when they were first potted up - I had them in long plastic seed holders with continuous water - aluminum roasting pans work well also. Good luck!
Judith
