Caring for evening primrose » watering, fertilizing, cutting and more How often do you have to water evening primroses? When and with what should you fertilize evening primroses? When and how to cut evening primroses? Which diseases / pests are common in evening primroses? How are evening primroses overwintered? Help the development of the site, sharing the article with friends! Help the development of the site, sharing the article with friends! Category: Herbs