Gardening Questions And Answers
Evening primrose oil contains an omega-6 essential fatty acid that is necessary for good health. However, while there is some evidence that taking evening primrose oil supplements may benefit some health conditions, the study results are mixed. Most of the studies have been small and further research is needed.
However, primroses have requirements for cooler temperatures between 40 and 60 degrees for a number of weeks depending on the type of hybrid for seed germination, leaf growth and flower development. When plants that require a chilling period do not receive it, they begin to decline. It may take the plant years to die.
Primrose (Primula spp.) consists of a large group of hardy perennials that are sometimes grown as annuals. While the majority of primroses require regular watering, some do require a growing area that offers ample water, such as pond-side. Primrose growth can suffer with either too much or too little water.
Primroses can produce flowers throughout summer if provided with shade and temperatures below 80 degrees Fahrenheit. In warmer climates, such as USDA zones 8 and 9, gardeners can move potted primroses to provide sun and heat protection. Primroses require transplanting when they outgrow the original pot.
Most primroses and primulas do best in partial shade, with moisture-retentive soil. Some are more suited to growing in bog gardens and other varieties will tolerate slightly drier conditions, as long as there’s plenty of humus incorporated into the soil when planting. Most don’t grow well in harsh, direct sunlight.