Cordial!

Today I've made 1 1/2 batches of elderflower cordial for the wedding using my friend's recipe.

40-60 heads elderflower
2 kg sugar
2 litres water
2 lemons
25 g citric acid

1. Remove as much green as possible from the flowers.
2. Bring water, sugar and lemon juice to the boil then turn off the heat.
3. Add citric acid.
4. Add elder flowers.
5. Leave for 4 days.
6. Strain into bottles.
7. Sterilise bottled cordial and tighten lids.

It got me to thinking about what other flowers I could use for cordials when I have a bit more time. Thoughts so far: gorse, honeysuckle, lime flowers... and a vast swathe of fruity things come glut season.