Transplanting your plants is very important, but more important is WHEN to transplant! It’s best to transplant your plants when they’re beginning their growing time – in spring and summer. Transplanting a plant in the winter is not advised. When transplanting, always go up by 2″. For example, if your plant is in a 10″ pot, transplant it into a 12″ pot. Always make sure your soil is light and airy in order to develop a good root system.