Tomato seedling stems turning red, wrong lights?
My tomato seedlings stems and veins are turning red. I am using 2 48" plant and aquarium bulbs. I am new to growing under lights and was not sure which bulbs to get. This happened to me last year as well but I didn't start using the lights until they were about 3" tall. Eventually the leaves started to get reddish and started to curl. They didn't die but were rather sickly looking. Did alright once in the ground but didn't really flourish. I grew tomatoes in my window the year before no problem. They have just gotten their first true leaves so I have not fed them yet. They are growing in peat pots with seed starting soil. I am about ready to just put them back in the window!! Any help would be appreciated.