Combine the ingredients and allow to infuse for about 4 to 7 days. Strain when ready to use.
For the margarita:
Fill a shallow dish with course salt. Run a lime wedge around the edge of a margarita glass, dip it into the salt to coat the rim and place it in the freezer to chill.
In a cocktail shaker filled with ice, add the tequila, orange juice, Cointreau and lime juice.
Shake well and pour into the chilled glass.
Recipe notes
Marigold petals are available online, at a local florist or in your own garden.