Evening-primrose

Scientific Name: 
Oenothera biennis

Common Evening-primrose, or 'Evening Star', was introduced into the UK in the 1600s and has since become naturalised on dry waste ground, roadside verges, sand dunes and railway cuttings. Its common names allude to its large, yellow, sun-like flowers that actually only open in the evening. These blooms appear on tall spikes from June to September and attract bees, butterflies and moths searching for nectar. For this reason, Common Evening-primrose is a good choice for wildlife gardens.

How to identify: 
Common Evening-primrose has large yellow flowers comprising four petals that appear in loose formation on tall stems. Its narrow, lance-shaped leaves have red veins.
Where to find it: 
Scattered distribution when it has become naturalised, mainly across central and south-east England.
How people can help: 

To encourage wildlife into your garden, try planting native flower species in your borders to provide a 'nectar-cafe' for bees and butterflies. But if you do prefer some non-native varieties, be careful when you throw away cuttings - species can easily escape into surrounding habitats and can cause problems for local wildlife. To find out more about wildlife-friendly gardening, visit our Wild About Gardens website: a joint initiative with the RHS, there's plenty of facts and tips to get you started.

Statistics: 
Height: up to 1.5m
Conservation status: 
Introduced species.
Did you know?: 
Common Evening-primrose has long been cultivated for its seeds which are the source of evening-primrose oil. This oil is used in complementary medicine to decrease premenstrual syndrome and treat skin disorders such as dermatitis and psoriasis.
Seasons: 
Summer
Autumn
When to see
Start date: 
June
End date: 
September
Image: 
Evening-primrose - northeastwildlife.co.uk