I've got some tomato sprouts that have been up for about two weeks going on three. I keep them in a closet with grow lights a few inches above them and a fan that comes on and off to simulate wind. On the few nice days we've had I put them outside for the day. The last time it was two days in a row. The first bottom leaves on all of them are turning brown and I don't remember that happening last year (my first year). The upper newer leaves on most of them are a deep green with sort of reddish veinlike markings on a lot of them, and I don't remember that either. They are Rutgers. Is it normal for the bottome leaves to turn brown like that, and should they be clipped off? On one or two of the plants parts of some of the upper leaves are brown, sort of like blight. Could they be getting too much sun on the nice days, or what?
Thanks for any help!