Dried Curry Leaves must be kept in an airtight container. They are less flavourful than the fresh variety and you may need to use more of them to compensate for the loss of flavour.
When purchasing fresh curry leaves, make sure they are still on their stem and are a deep green in colour. They will last 5 to 7 days in the refrigerator. If you don’t plan to use them quickly,wash and dry them using kitchen paper and freeze them in a ziplock bag. https://www.amazon.co.uk/shop/authentic_punjabee_cooking