Collect your chive blossoms. For best flavor, look for flowers that are in full bloom and have not started to wilt.
Clip the chive blossoms off the stems. You can preserve the stems to use as a garnish or to add to your infusion for extra chive flavor.
Thoroughly rinse your chive blossoms. Remove any dirt or bugs from the flowers.
After washing, lay your chive blossoms on a towel and allow them to dry completely.
After drying, add your chive blossoms to a clean glass jar. I like to use a quart or pint-sized mason jar.
Add enough vinegar to cover the blossoms.
Crush the chive blossoms against the bottom and sides of the jar a bit to help them release their flavor.
If desired, add some chive stem or leaf clippings for extra flavor.
Add a fermentation weight if desired.
Seal your jars using nonmetal lids or a barrier between the jar and metal lid.
Label your vinegar infusion with the approximate finish date so that you remember when it should be done.
Store your chive blossom vinegar in a cool dark place and allow it to infuse for about two weeks.
Check your infusion after 2 weeks and taste test it. If you're happy with the results, strain the vinegar through a sieve to remove the chive blossoms and any chive pieces. (If desired, you can allow your vinegar infusion to sit for up to three weeks for stronger flavor.)
Pour your strained vinegar into clean, air-tight jars and enjoy!