No, onion is not a rooting hormone.
Rooting hormones, also known as auxins, are plant-derived chemicals that promote root development. Onions contain sulfur compounds that can have a slight stimulating effect on root growth, but they are not considered a true rooting hormone.
While onions can be used in various gardening practices, their primary function is not to encourage root growth. For example, some gardeners believe that burying onion skins near plants can help deter pests. However, this practice is not directly related to root development.
To promote root growth effectively, it is recommended to use commercially available rooting hormones that contain auxins. These products are specifically designed to stimulate root development and are available in various forms, including powders, liquids, and gels.
