Hibiscus tea is more readily available than dried hibiscus petals, but those could certainly be used here, too. When it comes to hibiscus teas, read the labels carefully. Some are pure hibiscus (obviously!), but some feature additional (sometimes artificial) flavorings. I personally like the blends that feature blackberry or raspberry leaf and lemongrass, such as
Traditional Medicinals.
Vegan version: swap the honey for maple syrup and the white chocolate for coconut butter (omitting the additional coconut oil).