North America Native Plant

Fremont’s Evening Primrose

Botanical name: Oenothera macrocarpa fremontii

USDA symbol: OEMAF

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Megapterium fremontii (S. Watson) Britton (MEFR3)  âš˜  Oenothera fremontii S. Watson (OEFR2)   

Fremont’s Evening Primrose: A Hidden Gem for Prairie Gardens If you’re looking for a native wildflower that brings both beauty and ecological value to your garden, let me introduce you to Fremont’s evening primrose (Oenothera macrocarpa fremontii). This charming perennial might not be the most famous member of the evening ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Fremont’s Evening Primrose: A Hidden Gem for Prairie Gardens

If you’re looking for a native wildflower that brings both beauty and ecological value to your garden, let me introduce you to Fremont’s evening primrose (Oenothera macrocarpa fremontii). This charming perennial might not be the most famous member of the evening primrose family, but it’s definitely worth getting to know – especially if you’re passionate about supporting native plant communities.

What Makes Fremont’s Evening Primrose Special?

Fremont’s evening primrose is a delightful native forb – that’s gardener-speak for a soft-stemmed flowering plant that comes back year after year. Unlike woody shrubs or trees, this beauty stays low and herbaceous, making it perfect for wildflower gardens and naturalized landscapes.

You might also see this plant listed under its synonyms Megapterium fremontii or Oenothera fremontii in older botanical references, so don’t let the name variations confuse you – they’re all referring to the same lovely plant.

Where Does It Call Home?

This evening primrose is a true Great Plains native, naturally occurring in Kansas and Nebraska. It’s part of the rich prairie ecosystem that once covered vast swaths of the American Midwest. When you plant Fremont’s evening primrose, you’re not just adding beauty to your garden – you’re helping preserve a piece of America’s natural heritage.

Why Consider Growing It?

Here’s where things get interesting. Fremont’s evening primrose has a Global Conservation Status of S5T3, which suggests it’s not as common as some of its evening primrose relatives. This makes it a particularly valuable addition for gardeners who want to support biodiversity and help preserve native plant communities.

As a native species, this plant is naturally adapted to local growing conditions, which means:

  • It’s likely to be more drought-tolerant once established
  • It requires fewer inputs like fertilizers and pesticides
  • It provides authentic habitat for native wildlife
  • It connects your garden to the local ecosystem

A Word About Responsible Sourcing

Given its conservation status, it’s crucial to source Fremont’s evening primrose responsibly. Never collect plants or seeds from wild populations. Instead, look for reputable native plant nurseries that propagate their stock ethically. This ensures you’re supporting conservation efforts rather than potentially harming wild populations.

Garden Design Ideas

Fremont’s evening primrose shines in:

  • Prairie restoration projects
  • Native wildflower meadows
  • Water-wise landscape designs
  • Pollinator gardens
  • Natural-style borders and edges

Its low-growing, herbaceous nature makes it an excellent companion for native grasses and other prairie wildflowers. Think of it as a supporting character that adds authentic charm to your native plant community.

Growing Tips and Care

While specific growing requirements for this subspecies aren’t widely documented, evening primroses as a group are generally:

  • Adaptable to various soil conditions
  • Drought-tolerant once established
  • Preferring full sun to partial shade
  • Low-maintenance once settled in

Since this is a Great Plains native, it’s likely adapted to the challenging conditions of that region – hot summers, cold winters, and variable rainfall. This hardiness can be a real asset in the right garden setting.

The Bottom Line

Fremont’s evening primrose offers gardeners a chance to grow something truly special – a native plant with conservation value that connects your landscape to the authentic prairie ecosystem. While it may require a bit more effort to source responsibly, the reward is a garden that truly supports local biodiversity.

If you’re creating a prairie garden, working on habitat restoration, or simply want to add some lesser-known native charm to your landscape, Fremont’s evening primrose deserves a spot on your plant wish list. Just remember to buy from ethical sources and help this lovely native continue to thrive for future generations to enjoy.

Fremont’s Evening Primrose

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Myrtales

Family

Onagraceae Juss. - Evening Primrose family

Genus

Oenothera L. - evening primrose

Species

Oenothera macrocarpa Nutt. - bigfruit evening primrose

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA