Also called Large Flowered Evening Primrose, Large Flower Evening Primrose, Large Evening Primrose, Garden Evening Primrose, Red Sepaled Evening Primrose
Redsepal evening primrose is a garden hybrid, usually grown as a biennial, with showy spikes of large yellow flowers that fade orange to red. It is often naturalised and can behave as an invasive weed, so it is best kept deadheaded and in check.
Family
Onagraceae (Evening-primrose family)
Grows as
Perennial
Light
Full sun
Water
Water regularly during dry spells, letting the top of the soil dry slightly between waterings.
Soil
Well-drained garden soil, tolerant of poor or sandy ground.
Temperature
10–25 °C; hardy to about -15 °C.
How easy
Easy
Native range
as a cultigen originating from O. elata × O. grandiflora hybrids in Europe.
Climate
temperate
About
Oenothera glazioviana is a species of flowering plant in the evening primrose family known by the common names large-flowered evening-primrose and redsepal evening primrose. Oenothera lamarckiana was formerly believed to be a distinct species, but is now regarded as a synonym of Oe. glazioviana. Oenothera glazioviana can be found in scattered locations worldwide as an introduced species and in some locations behaves as an invasive species. It has long been cultivated as an ornamental plant.
Where it grows
Oenothera glazioviana arose as a garden hybrid between Oenothera elata and Oenothera grandiflora in Europe. It is cultivated as an ornamental plant, and has become naturalized in many countries around the world, like Britain and Ireland, where it is the most common species of its genus.
Text excerpted from the Wikipedia article Oenothera glazioviana by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.