I can't see any reason, apart from the 'eewww gross' factor, not to use menstrual blood. I'd be more inclined to look at adding it to the compost rather than using it directly.
sarah louise Reviewed by sarah louise on . Menstrual Blood as fertilizer? My wife has been using a diva cup instead of tampons or pads, and suggested using it as a fertilizer. Has anyone done this before? Results? And as far as application, should it be dilluted and applied during a regular watering? Is there a time when it's application would be of most benefit (veg/flower/on her once a month schedule)? Rating: 5