Just noticed the lower leaves on my summer purple sprouting broccoli...
Just noticed the lower leaves on my summer purple sprouting broccoli seedlings are turning yellow. These appear to be the cotyledons so is that normal? They are under a gro-light (18hrs), watered from the bottom and given very light fan breeze 2 hours twice a day. Each now 2-3 inches tall. I plan to transplant out next week. In a SFG some say one per square , some one per 4 squares? Any other general advice?
Your seedlings are of appropriate size to move outdoors. Remove the yellow leaves. Plant them a little deeper than they are now planted and give them some balanced fertilizer. They should grow out of the problem.
Broccoli will do nicely when planted one per square foot.