Beginner Gardening: Having trouble with broccoli leaves turning dry and brown, 1 by w00dn0t

w00dn0t wrote:
This is only my second attempt at a garden. Last year I built two vegtrugs, got a little bit of a late start, and lost everything I planted to one pest or another. This year I have tried to take a little more control and started seeds in my basement. I have had some success with that however, my broccoli plant\'s leaves are turning brown and dry. It started in the \"nursery\" and I thought that the plant had gotten too big and needed to go into the vegtrug outside. While it may be a little early here in CO, I thought that getting it outside would benefit it more. I do have a green house cover on the vegtrugs so they are fairly protected from the elements. I have included a couple of photos: the shot of the single tray was taken on 3-26-17 and the leaves were just starting to curl. The shot with two trays was taken the following week (I planted some extra seeds in the event of loss). The pictures of the leaves were taken on 4-14-17 when I decided to take some of the larger plants (broccoli, cauliflower, and tomato) and transplant them to the vegtrugs as they were hindering light getting to some of the smaller sprouts.

The soil, light, stand, and trays were a kit that I got from Gardener\'s supply this year and all of my seeds came from Burpee.

Any thoughts, guidance, or advice would be greatly appreciated.

Thanks,