I started my seeds in vermicutlite. I wouldn't suspect that they are root bound, just yet. But they may to be potted up in some potting mix. I have clematis, cannas, amaranthus, callas, shrimp plants and dahlia sprouts. I have them under grow lights just a couple of inches over the plants from 6 am - 10pm. I will check out the roots once I make it home. I potted up the clematis and cannas. I have been giving them a waek shot of fertilizer. I will post a picture once I make it home.