Although some varieties of kale are available year-round, cooler months are the best time to enjoy the leafy winter green at its sweetest, most flavorful peak. Who knew there were so many different types of kale? As kale grows more popular with healthy eaters or just eaters with an eye toward healthier foods, the number of kale types available in grocery stores will likely continue to grow. This guide to the many different varieties of kale will help you decide which is best for the dish you're planning to prepare.