Assemble: Place flowers face down in each ice cube well, then fill ¾ full with water. Push the flowers in so they're as covered with water as possible.
Freeze: Freeze until solid. Fill the rest of the way up with water then freeze again.
Notes
For crystal clear ice cubes, use distilled, boiled, and cooled water.Spruce it up by adding a dash of elderflower syrup to each ice cube well.