What are microgreens? Microgreens are the seedlings of the edible vegetables and herbs are already familiar with and often eat. There are three basic parts to all microgreens. First, there is the central stem. Next come two cotyledon leaves, and usually the first pair of very young true leaves. The latest trend began in Southern California in the mid 1990’s. Originally, there were only 6 flavors available: Arugula, Basil, Beets, Kale, Cilantro and a mixture called Micro Rainbow Mix. However, now there are many different flavors and varieties available.