Spots on Lettuce
Hey everyone ,
This is my first post and grow. I am growing lettuce hydroponically. It's been growing since June 25 from seed I recently noticed these hard to see spots on the leaves they look greyish on the front side of the leaf and on the back of the leaf they are darker. On the larger leaves there are none, I noticed mainly on the bottom smaller leafs is what is spotting. Any ideas? Can this be corrected?