i am not aware of a plant-based birth control that is available by prescription (and as such would be approved by the food and drug administration). if you are concerned with the active ingredients that may be present in a prescription product then you might consider non-hormonal methods of contraception such as condoms a diaphragm a cervical cap the sponge or a copper intrauterine device (iud).
is there a plant-based birth control? i am breastfeeding and don’t want to use chemicals.