This biennial herb, also known as Fever Plant, can grow up to 4 feet high. The flowers are yellow and they usually open around seven o'clock in the evening which make this plant different from many other blooming plants.
Grow Evening Primrose in fairly good sandy soil in a sunny location.
The French often use Evening Primrose for garnishing salads.
Part used: Bark, leaves.
Don't use if you suffer from migraines or if you have epilepsy.