Oenothera biennis aka Common Evening Primrose
Taxonomy ID: 7653
Oenothera biennis, also known as the common evening-primrose, is a biennial species of flowering plant in the family Onagraceae. It is native to eastern and central North America, but has been widely naturalized in temperate and subtropical regions around the world. Other common names for the plant include evening star, sundrop, weedy evening primrose, German rampion, hog weed, King's cure-all, and fever-plant.
The plant can grow to be 30-150 cm tall and has lanceolate leaves that are produced in a tight rosette in the first year and spirally on a stem in the second year. Blooming lasts from late spring to late summer, and the hermaphroditic flowers are produced on a tall spike. The flowers, which are yellow and have four bilobed petals, only last until the following noon. The plant gets its name from the fact that the blooms open visibly fast every evening, producing an interesting spectacle.
Evening primrose oil is produced from the plant, which has a bright nectar guide pattern that is apparent under ultraviolet light and visible to its pollinators, moths, butterflies, and bees. However, the plant can be invasive in eastern and central North America.
Common Evening-Primrose is a super rare houseplant that is relatively easy to grow. It needs regular watering and does best in long-lasting, direct light that is less than 1 foot from a window. The plant prefers well-draining soil and doesn't need added fertilizers if you repot it each time it doubles in size. The plant belongs to the Oenothera genus and is native to Canada and the United States.
Common names
Common Evening Primrose, Evening Star, Sundrop, Evening Primrose OilMore information about Common Evening Primrose
How difficult is it to take care of Common Evening Primrose
With a bit of knowledge and dedication, you can successfully care for Common Evening Primrose, making it a rewarding choice for those seeking a moderate challenge.
What is the region of origin of Common Evening Primrose
Common Evening Primrose’s native range is Eastern N. America - Labrador, south to Florida and Texas. Naturalized in Britain.
What are the water needs for Common Evening Primrose
Common Evening Primrose should be watered regularly, allowing the soil to dry out between waterings.
What is the right soil for Common Evening Primrose
Common Evening Primrose loves a well-draining soil. Perlite and vermiculite help with drainage, while coco coir adds organic matter, so a good potting soil mix will have all three. You can improve store-bought soil by adding some perlite to it.
What is the sunlight requirement for Common Evening Primrose
Common Evening Primrose requires abundant, bright, and direct light to thrive. The best placement for this plant is within one foot of a window to ensure it receives enough light. If you live in an area with more extreme weather, such as hot summers or cold winters, you may need to adjust the placement of the plant accordingly. During hot summer months, it is important to place the plant away from full sun, as this can cause the leaves to yellow or burn. During cold winter months, it is best to move the plant closer to the window to take advantage of the extra light that can help it survive. By keeping an eye on the current weather in your area, you can make sure your Evening Primrose Oil is always in the right place to thrive.
How to fertilize Common Evening Primrose
The Common Evening Primrose should be repotted when it has doubled in size or annually, whichever comes first. Providing fresh potting soil with all the essential nutrients each year ensures the plant's well-being, eliminating the need for fertilizer. Remember, plants derive their energy from the sun and not fertilizer.
Is Common Evening Primrose toxic to humans/pets?
Ploi lacks confirmed information on the toxicity of this plant. If you, a relative, or your pet accidentally consume plant material with unknown toxicity, it's best to consult a medical expert.
What is the growth pattern of Common Evening Primrose
New growth will sprout from the top of the Common Evening Primrose as it grows vertically.
More info:
Wikipedia
More Species in Oenothera Genus

Oenothera laciniata Cutleaf Evening Primrose

Oenothera elata Hooker's Evening Primrose

Oenothera serrulata Serrate Leaved Evening Primrose
Oenothera stricta Fragrant Evening Primrose
Oenothera clelandii Cleland's Evening Primrose

Oenothera triloba Sessile Evening Primrose
Oenothera pallida Pale Evening Primrose

Oenothera glazioviana Large Flowered Evening Primrose
