Bring water to a boil

Shake the elderflowers one by one to remove any bugs

Remove the bigger stems of the elderflower heads

Wash then slice the lemons

Place lemons and elderflowers in a large pot or bucket then sprinkle the citric acid over it

Pour the boiling water over the elderflower mix then stir

Put a lid over and let it stand for 2 days, giving it an occasional stir now and then

Use a fine sieve to separate the liquid from the parts you don't want stuck between your teeth. If you want the liquid clear then you should probably use a cheesecloth or similar

Add sugar to the liquid and bring to a boil while stirring to dissolve the sugar. Try to remove as much of the foam as possible to a separate glas (mix the foam with cold water and you can take your first sip of summer in a glas)

Pour the liquid into sterilized bottles and you can store it in the fridge for several weeks. If you don't think you will use it as quickly then I recommend you freeze it instead

Mix with around 4 parts cold water to get a delicious lemonade or cordial!