Unlike other succulents, Euphorbia Flanaganii aka Medusa’s Head does not like to go for long periods without water. In growth season (Summer), it will need at least once a week watering to keep it hydrated.
Medusa’s Head needs at least six hours of direct sun to thrive. Once it is fully developed, the mother plant will develop pups on her arms which can be cut and propagated (I recommend doing this in summer when it is not dormant). They usually flower at the end of spring, just before the summer growth season kicks off once again.