Pick the elderflowers where the flowers are all white and blossoming - Leave the ones with brown flowers to become beautiful elder berries.
Shake the elderflower heads, to remove small insects and leaves. (Dont wash them as all of the flavor is in the yellow powder that is on the flower heads. )
Cut the flowers off the step with a little of the stem left as possible.
Cut the lemons into slices.
Add elderflower heads and lemons to a bowl and cover with sugar. Add the citric asid to the mix.
Poor over the boiling water and stir it to make sure that all of the elderflowers are covered (careful as the water is very warm)
Cover the mix with an airtight lid, and leave it in a cool place for about 3 days (we leave in our cold room - but a garage or a cellar would work as well)
After 3 days - sift the mixture through a cloth, and add the cordial to rinsed, sanitized bottles.
Add about 3-4 parts of water to every part of Elderflower cordial - try and serve it over ice - its a fantastic summer drink.