I have the same problem. 1 month old, not 2 inches tall Barneys Farm LSD. I germed some black trifele tomatoes at the same time, same everything and some of them are 6 inches tall and very healthy. In fact all my veggies are doing great. Using grow plugs in good soil under T5s. Obviously I'm doing something wrong. I've been growing for several years and have no problems with clones and think thats what i'd better stick to.