I thin the plants in the greenhouse trays. Here is my Greenhouse Thinnings Salad, a greenhouse by-product gourmet treat. When we are out in the garden, the kids know to come running in the greenhouse for “snacks”. I give them little handfuls of treats from the greenhouse–delicate micro-greens including cabbage, chard, spinach, beets, kale, tiny onions. I have also taken to planting a couple flats of lettuce and chard, designated as “greenhouse snack trays”.