Harvest fresh lilac flowers (roughly half a grocery bag) of branches) inspecting the blooms to make sure you're getting them as fresh and perfect as possible. I cut them from the shrub when trimming my lilacs.
Bring the branches inside, lay them on a tray in a single layer and give each branch a good shake. Wait 30 minutes to give any insects time to evict themselves.
Honey Lilac Syrup
Combine the honey and water and warm until dissolved. Cool, pour into a bowl or jar, adding the flowers and pressing them under the liquid with a spoon. Refrigerate, tightly covered for 24 hours.
Strain the flowers from the syrup through cheesecloth, squeezing out as much syrup as you can. Rinse the cheesecloth so you can reuse for the second infusion.
Add the remaining flowers and repeat the infusing process.
Meanwhile, fill the other jar half full with fresh lilac sprigs, then pour over the water, top with a lid, and allow to infuse at room temperature for a couple hours, then move the to refrigerator.
Strain the lilac water through cheese cloth.
Strain the second infusion of the honey syrup through the same cheesecloth.
Assembly
Pour half of the lemon juice and ½ cup of the lilac syrup into the lilac water, stir to incorporate, then taste and adjust until it tastes good to you.
Serve the lemonade on ice, garnished with a sprig of anise root or anise hyssop (optional) and a wedge of lemon.
I think it has the freshest taste served right away. Over time after mixing with the other ingredients the aroma will mellow.
Lilac-Gin Cocktail
Add your favorite gin for a refreshing cocktail. I'd start with 1 cup total for the quart jar batch to serve four people.
Video
Notes
Honey is a natural pairing with flowers and is what I use here, but it also has its own flavor, and while I don't love white sugar, the flavor is more neutral and doesn't compete with the lilacs for center stage, for what it's worth.