What are Leafy Greens? Leafy Greens also known as salad greens, leaf vegetables, pot herbs or simply greens. Leafy greens are edible plant leaves that we eat as a vegetable. They are green, shallow-rooted plants, which are very beneficial for our health, because they are packed with a variety of vitamins and minerals. Generally leafy greens are easy to grow and have a quick growth cycle. For example they are ready to harvest within 4-6 weeks only.