Plant Wiki

The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

  • 13,000+plants with full pages
  • 365,000+plant species worldwide
  • 220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Plant Wiki › Browse plants

Yellow Sundrops

Oenothera tetragona

Also called Narrowleaf Evening Primrose

Yellow Sundrops
Photo: Meneerke bloem, CC BY-SA 3.0

Oenothera tetragona is a native North American perennial wildflower with yellow evening blooms, valued for attracting pollinators. It is a hardy, low-maintenance plant for sunny, well-drained spots.

Family
Onagraceae (Evening-primrose family)
Grows as
Perennial
Light
Full sun
Water
Water moderately while establishing, then mostly rely on rain; let the soil dry between waterings.
Soil
Average to poor, well-drained soil; tolerates sandy or gravelly ground.
Temperature
Hardy in cold winters, roughly to -30 °C; tolerates summer heat.
How easy
Easy
Native range
E. Canada to EC. & E. U.S.A.
Climate
temperate

About

Oenothera tetragona, the glaucous evening primrose, is a species of flowering plant in the family Onagraceae, native to eastern North America, and introduced to Germany, the Czech Republic, and Myanmar. The Royal Horticultural Society considers it a good plant to attract pollinators. There is a cultivar, 'Glaber', also known as 'Clarence Elliott'.

Other Oenothera plants

Common evening primrose · Tufted Evening Primrose · Antioch Dunes evening primrose · Birdcage evening primrose · Beach evening primrose · Hooker's evening primrose · Narrowleaf evening primrose · Redsepal evening primrose · Cutleaf evening primrose · Lindheimer's Beeblossom · Threadleaf evening primrose · Longstem evening primrose

Text excerpted from the Wikipedia article Oenothera tetragona 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.

Credits & terms

Identify a plant

Point at a leaf or flower and snap. One plant in frame works best.

Your photo
Starting camera…