Grown lettuce in window box, not as crisp as the store lettuce
ok, so my lettuce is growing great in a large window box. I have 3 varieties, they are Chadwicks rodan lettuce, lettuce petite rouge and lettuce tom thumb. But they seem a little soft and wimpy. The tomb thumb is a little thicker/stronger lettuce. All of them dont seem as crisp as the store lettuce.
Is it because of the varieties these lettuce are or because of the recent the hot weather. They dont seem to be bolting. I will try to post a picture, for a better idea.