I have a mix of tomato plants (Cherry and roma), some I started myself and some I purchased from the nursery. The ones I grew myself have a purple underside to the leaves and a less bright, muted colored green on the top of the leaves. The stems are also a little purple and have a very fine peach fuzz on them. I grew them under a florecent light (Mix of warm and cool bulbs) and I hardened them off for a few days. I did not really notice the difference in colors until I saw them next to the store bought plants. Has anyone had expereicen with this?