Step 1

Add the honey and water to a bowl or other container (one that will fit into your refrigerator). Whisk until the honey is completely dissolved into the water.

Step 2

Rinse the lilac blossoms in a fine sieve to remove any dust or insects.

Step 3

Place the blossoms into the honey mixture and stir. Not all of the blossoms will be submerged, but that's fine. Add the blueberries to the syrup.

Step 4

Cover and refrigerate for 24-48 hours. Taste after a full day and if you'd like, the syrup can steep for one more day, but don't go longer than 48 hours.

Step 5

Once the lilacs have finished steeping, strain them out.

Step 6

Add the lemon juice if desired and stir to incorporate.

Step 7

Pour the syrup into clean glass jars and store in the refrigerator for a week or two. It can be frozen for up to two months.