What Are Microgreens? Microgreens are small edible plants that are harvested just after the first leaves appear. They usually grow to heights of one to three inches and can be cultivated from various vegetables, herbs, and even grains. Common varieties include radishes, broccoli, mustard greens, arugula, and basil. What makes microgreens particularly appealing is their impressive nutrient density. Studies show that these tiny greens can contain up to 40 times more vitamins an