Step 1: Wash the blossoms Place your harvested blossoms in a bowl of cool water and let them soak for a few minutes. This will help dislodge any dirt or tiny insects hiding in the flower heads. Drain and gently pat dry with a clean towel.
Step 2: Fill your jar Pack the blossoms into your clean quart mason jar until it's about two-thirds full. You can gently press them in but don't compact them too tightly.
Step 3: Warm your vinegar Pour the vinegar into a small saucepan and warm it over medium-low heat until it's warm but not boiling — you want it steaming gently. Heating the vinegar slightly helps speed up the infusion process and draws out more color and flavor from the blossoms. If you skip this step, no big deal — it will just take longer to steep.
Step 4: Pour and steep Pour the warm vinegar over the blossoms, making sure they are all submerged. Give the jar a gentle stir or press the blossoms down with a spoon. Cap the jar with a plastic lid (or place a piece of parchment paper between the jar and the metal lid to prevent corrosion). Set the jar in a cool, dark place — a kitchen cabinet works perfectly.
Step 5: Wait (the hardest part!) Let the blossoms steep for 2 to 3 weeks for the best flavor and color. You'll notice the vinegar turning pink within just a few days — it's such a satisfying thing to watch. Taste it along the way and stop when you're happy with the flavor intensity.
Step 6: Strain and bottle Strain out the blossoms using a fine mesh strainer or cheesecloth. Pour the finished vinegar into a clean bottle or jar. It will keep for up to a year in a cool, dark cabinet.