One to two weeks. The longer the prune wine soak the purer, the better the taste will be after opening, but a long time soaking will make the prune flavor fade and affect the taste, so the soaking time for one to two weeks is the best. Prunes are rich in nutrients, beneficial to human health, containing a variety of vitamins, minerals and other nutrients beneficial to the body, can enhance the body's metabolism, beneficial to cardiovascular health.