I haven't grown toms before so am tending my little G. Delight with I hope the right care. The bottom leaves are light green, and the top ones are dark green. The bottom leaves are not light enough to be called yellow, but the difference is definitely noticable - I've got some on the windowsill and some in a plastic mini-greenhouse outside and they are all showing this - Can someone please advise if this normal, and if not am I doing something wrong. I'm not feeding them anything yet, and they are between 4-6 inches high, with about 7 leaves. Thanks Ceri