Yes, just make sure you dry or freeze some elderflower blossom heads when it's in season (May- June in Europe), freshly picked and organically grown. Drying elderflower blossoms • Wash thoroughly the blossomed elderflower heads when foraged - allow these to dry by spreading them on a table at a distance on paper sheets. When these are completely dry, place them in paper bags and place these in a dark, dry and cool place.