Elderflower has one of the shortest harvest windows of any ingredient in the bar garden — about three weeks, sometimes less, in late spring. The flowers appear seemingly overnight, bloom brilliantly for a moment, then drop their petals and it's over for another year. Miss the window and you're waiting until next May.
Right now, in late May, elderflower is either at peak or close to it depending on your zone. This is the guide for what to do about it.
What Elderflower Actually Is
Elderflower comes from the elder tree — Sambucus nigra — which grows widely across North America and Europe, often along roadsides, fence lines, and woodland edges. It's not a cultivated crop so much as a plant that grows where it wants. The flowers appear in large flat-topped clusters called corymbs, creamy white and intensely fragrant.
The same plant produces elderberries in fall. The berries require cooking before use and are mildly toxic raw. The flowers are safe to eat fresh and are what St-Germain liqueur is made from — and what you're going to make your syrup from.
If you want a reliable supply, plant an elderberry shrub (Sambucus nigra 'Black Lace' is a beautiful ornamental variety). Two plants cross-pollinate and give you both flowers in spring and berries in fall.
How to Know When to Harvest
Timing is everything with elderflower. Harvest too early and the fragrance hasn't developed. Harvest too late and the flowers have started to drop and the scent turns slightly musty.
The right moment is when the cluster is about 70–80% open — individual flowers are open but the cluster still has a few buds that haven't fully unfurled. At this point the fragrance is at its most intense: floral, honeyed, and slightly citrusy. Smell is your best guide. If it smells incredible, harvest it now.
Cut flower clusters in the morning before the heat of the day diminishes the oils. Use scissors or garden snips. Avoid washing if possible — the pollen is part of the flavor. Shake gently to dislodge any insects instead.
The Elderflower Syrup Recipe
This recipe is simple. The only variable is how many flower clusters you have — scale up or down accordingly.
- 15–20 fresh elderflower clusters
- 2 cups water
- 2 cups white sugar
- Zest of 1 lemon (optional — adds brightness)
What to Make with It
Elderflower syrup is one of the most versatile bar syrups you can make. It works in cocktails and mocktails equally well — the floral sweetness elevates anything it touches.
- Elderflower Spritz: 1 oz syrup + 3 oz prosecco + splash of soda + lemon. Simple and stunning.
- Gin Fizz: 1½ oz gin + ½ oz elderflower syrup + ¾ oz lemon + egg white*. Shake dry then wet. Strain into a coupe.
- Mocktail Lemonade: ¾ oz elderflower syrup + 1 oz fresh lemon + 4 oz sparkling water over ice. One of the best non-alcoholic drinks there is.
- Add it to anything: A half-ounce of elderflower syrup improves almost any sparkling drink. Try it in a gin and tonic.