Freezing elderflower blossom heads • Wash these thoroughly (see notes in the recipe card) and allow them to dry and freeze in sealed bags or containers. I recommend you freeze 3-4 blossomed heads in a bag to use the whole batch when needed. For the best results, when you are using them from frozen as well as dried, add them to hot water and then allow them to cook. You will get a lot more flavour this way.