It may be related to climate.

Broccoli, also known as green cauliflower, broccoli, tender stem cauliflower, Italian kale, and stem broccoli, belongs to the Brassica genus Brassica variety of the Brassicaceae family. Originating in the eastern coastal areas of the Mediterranean, it has been cultivated in small quantities in my country in recent years. It is mainly used for Western food. It is rich in nutrients and contains protein, sugar, fat, vitamins and carotene. Its nutritional content ranks first among similar vegetables, and is known as the "Crown of Vegetables" . In addition to fighting cancer, broccoli is also rich in ascorbic acid, which can enhance the liver’s detoxification ability and improve the body’s immunity.