I grew some sweet peas from seed for the first time. They all germinated and I have been growing them in a seed tray on the dining room table, near a window, because the greenhouse is still bitterly cold. They shot up and looked very straggly, so with advice from a forum member I moved them into the kitchen as they were a bit too warm in the first room. So far so good. Then I repotted them into deeper pots as they were getting too big for the seed tray, and nipped out the tops. After a couple of days they looked a bit droopy, and their leaves are a bit limp, but with a hard rim. I moved them back into the dining room, in case the kitchen was just too cold (no radiator), but they are not improving and just look a bit miserable. Any advice on what to do? Something's wrong, but I don't know what. They are damp but not wet, and hav been getting fed with Baby Bio. I've included a photo in case that sheds some light.