BTW I've also read that this tends to happen routinely with certain varieties, so if that's the case for any of these, let me know!

Cherokee Purple
Black Cherry
Chadwick
Beefstead

In my opinion it is probably a temp/light issue at this stage. I don't worry about it. Usually for some reason the uptake of P is probably low causing this issue. Many get excited when they see the purple stems and leaves. I treat them like an older mechanic taught me when I was just learning my trade. He was very experienced and very sharp. I tended to notice every little noise. He would listen to it and then say "that is a radio noise. Just turn the radio up and don't pay any attention to it." And that is how I tend to treat the purple stems/leaves. Jay

As long as it's something that won't kill or permanently stunt them, then I probably won't worry about. I sort of expected some hiccups along way with the imperfect lighting conditions I have to work with. I just wanted to make sure it wasn't something that I could easily correct with what I have.

Heather, I agree with everything Jay said, and I have learned that if I ignore the purple it goes away on its own as the plants become more mature and begin receiving regular doses of direct sunlight. I tend to think it has more to do with immature vascular systems of the plants just not being able to utilize the P in the soil or in the fertilizer in the soil-less growing medium.

The purple does not harm them in any way nor is it any indication that the plants will have trouble in the future.

I had a handful of plants (maybe two dozen out of over 400) showing a little purpling when they were around 2 to 3 weeks of age. A few days later I began hardening them off outside with ever-increasing exposure to direct sunlight and the purpling was gone in just a few days. Once your plants are spending some time outside, I bet the purple goes away quickly, if it doesn't go away before that.

Dawn