Evening primrose (Oenothera biennis) is nocturnal by nature and as a result the corolla only opens in the evening and promptly closes in the morning. It is a beautiful sight to behind the plants as they open their brilliant yellow, four-petaled blossoms after sunset or on dark cloudy or rainy days.  The flower has a variety of uses in traditional health. It has been used as a natural response to address headache, nerve pain, and tremors, and has also been used as a "heart tonic" for sensations of dizziness and cardiac insufficiency. The flowers are sweet and have a mild lemony scent - the perfect addition to your favorite tea blend. 
 
A little more about evening primrose - it is a biennial with sturdy taproots. Some plants can grow to be 8ft tall although so far, our tallest have gotten around 5 -6 ft. The plants flower in their second season. They prefer growing in full sun in neutral, well-drained soil that stays moist.
 
Disclaimer:  Information shared on this site is for educational purposes. The information provided is not intended to be a substitute for medical treatment or advice. Please consult your medical care provider before using herbal medicine, particularly if you have a known medical condition or if you are pregnant or nursing. Although we do our best to provide accurate and useful information, you are responsible to research and verify information before relying on it. We are medicinal plant and herbs farmers, herbalists, and tea blenders. We are not licensed or registered healthcare practitioners.  We are also believers in the safety and efficacy of botanical medicine.