Oenothera macrocarpa
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Oenothera macrocarpa Missouri Evening Primrose



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Missouri Evening Primrose boasts brilliant yellow blossoms nearly as big as your palm!  The crepe-like flower petals are framed by gray-green foliage; leaves are narrow with distinct white veins.  This plant has red stems that tend to trail along the soil surface.  Despite such sprawling behavior, the overall appearance is a relatively tidy 1 foot tall mound.  Like most species in the Primrose family, each showy bloom is a “one and done” event - opening in the late afternoon, shining overnight, and fading away the following day.  An extensive bloom period and prolific flowers ensure a good self-seeding rate and season-long intrigue.  Fertilized flowers produce unique, 4-ridged fruiting pods that shift to burgundy and sienna hues with cooler fall temperatures. 

Oenothera macrocarpa is a tough beauty that thrives in full sun but will tolerate bright, light shade.  It grows in dry, depleted soils and prefers the quick-draining qualities of gritty, gravelly, sandy, or otherwise crummy sites.  If planted in more fertile environments, be sure to give it plenty of buffer from other plants - Missouri Evening Primrose will struggle among taller, more competitive species in rich soils.  A bonus of giving it a little extra turf is that it will use that designated space to self-sow and expand the population.  This is one of the few species within the Evening Primrose family that is perennial.  

Missouri Evening Primrose blooms primarily at night.  Because of this relatively uncommon feature, this plant attracts some equally exceptional, niche nocturnal pollinators: Sphinx Moths!  The moth family Sphingidae includes Hawk Moths, Hummingbird Moths, and Clearwing Moths.  Support these amazing species in their caterpillar stage, too - they're the hornworms that love to munch on tomato plants.  

Scientific name sometimes in use: Oenothera missouriensis
Also commonly called Fluttermill, Bigfruit Evening Primrose, and Missouri Primrose


Live Plant Shipping Table

Spring Fall Age/Size
Potted 3-PacksN/A September 2.5" wide x 3.5" deep pots

Oenothera macrocarpa - Missouri Evening Primrose

Map Key

This map shows the native and introduced (adventive) range of this species. Given appropriate habitat and climate, native plants can be grown outside their range.

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SEED:

Growing your own plants from seed is the most economical way to add natives to your home. Before you get started, one of the most important things to know about the seeds of wild plants is that many have built-in dormancy mechanisms that prevent the seed from germinating. In nature, this prevents a population of plants from germinating all at once, before killing frosts, or in times of drought. To propagate native plants, a gardener must break this dormancy before seed will grow.

Each species is different, so be sure to check the GERMINATION CODE listed on the website, in the catalog, or on your seed packet. Then, follow the GERMINATION INSTRUCTIONS prior to planting. Some species don't need any pre-treatment to germinate, but some species have dormancy mechanisms that must be broken before the seed will germinate. Some dormancy can be broken in a few minutes, but some species take months or even years.

Seed dormancy can be broken artificially by prolonged refrigeration of damp seed in the process of cold/moist STRATIFICATION. A less complicated approach is to let nature handle the stratifying through a dormant seeding, sowing seeds on the surface of a weed-free site in late fall or winter. Tucked safely beneath the snow, seeds will be conditioned by weathering to make germination possible in subsequent growing seasons.

To learn more, read our BLOG: How to Germinate Native Seeds

DORMANT BARE ROOT PLANTS:

We dig plants when they are dormant from our outdoor beds and ship them April-May and October. Some species go dormant in the summer and we can ship them July/August. We are among the few still employing this production method, which is labor intensive but plant-friendly. They arrive to you dormant, with little to no top-growth (bare-root), packed in peat moss. They should be planted as soon as possible. Unlike greenhouse-grown plants, bare-root plants can be planted during cold weather or anytime the soil is not frozen. A root photo is included with each species to illustrate the optimal depth and orientation. Planting instructions/care are also included with each order.

Download: Installing Your Bare-Root Plants

POTTED PLANTS:

3-packs and trays of 32, 38, or 50 plants leave our Midwest greenhouses based on species readiness (being well-rooted for transit) and order date; Spring shipping is typically early May through June, and Fall shipping is mid-August through September. Potted 3-packs and trays of 38 plugs are started from seed in the winter so are typically 3-4 months old when they ship. Trays of 32/50 plugs are usually overwintered so are 1 year old. Plant tray cells are approximately 2” wide x 5” deep in the trays of 38 and 50, and 2.5" wide x 3.5" deep in the 3-packs and trays of 32; ideal for deep-rooted natives. Full-color tags and planting & care instructions are included with each order.

Download: Planting and Care of Potted Plants

*PLEASE NOTE: we are a mail order nursery and have no retail facilities, but you may pick up your order if prior arrangements are made. Pick up orders are subject to **MN Sales Tax.

Shipping & Handling Charges:
SEED $100.00 and under: $5.00
Retail SEED orders over $100.00 ship free! Custom seed mixes or wholesale seed sales over $100, add 5% of the total seed cost
(for orders over $1,000 a package signature may be required)

BARE ROOT and POTTED PLANTS $50.00 and under: $9.00
over $50.00: 18% of the total plant cost. (For orders over $1,000 a package signature may be required.)

TOOLS and BOOKS have the shipping fee included in the cost of the product (within the contiguous US).

**We are required to collect state sales tax in certain states. Your state's eligibility and % will be calculated at checkout. MN State Sales Tax of 7.375% is applied for orders picked up at our MN location. Shipping & handling charges are also subject to the sales tax.

Shipping Season:

SEED, TOOLS and BOOKS are sent year-round. Most orders ship within a day or two upon receipt.

BARE ROOT PLANTS are shipped during optimal transplanting time: Spring (April-May) and Fall (Oct). Some ephemeral species are also available for summer shipping. Since our plants are field-grown, Nature sets the schedule each year as to when our season will begin and end. We fill all orders, on a first-come, first-serve basis, to the best of our ability depending on weather conditions beyond our control.

POTTED PLANTS (Trays of 32/38/50 plugs and 3-packs) typically begin shipping early May and go into June; shipping time is heavily dependent on all the species in your order being well-rooted. If winter-spring greenhouse growing conditions are favorable and all species are well-rooted at once, then we ship by order date (first come, first serve).  We are a Midwest greenhouse, and due to the challenges of getting all the species in the Mix & Match and Pre-Designed Garden Kits transit-ready at the same time, we typically can't ship before early May.  Earlier shipment requests will be considered on a case-by-case basis.

*We are unable to ship PLANTS (bare root or potted) outside the contiguous US or to CALIFORNIA due to regulations.

Delivery:

We ship using USPS, UPS and Spee Dee. UPS and Spee Dee are often used for expediting plant orders; they will not deliver to Post Office Box numbers, so please also include your street address if ordering plants. We send tracking numbers to your email address so please include it when you order.

FOR MORE DETAILED SHIPPING INFORMATION, INCLUDING CANADA SHIPPING RATES (SEED ONLY), PLEASE SEE 'SHIPPING' AT THE FOOTER OF THIS WEBSITE.

iDetails

Seeds/Packet
50
Seeds/Ounce
4,700
Germination Code
C(60)
Life Cycle
Perennial
Sun Exposure
Full, Partial
Soil Moisture
Medium-Dry, Dry
Height
12 inches
Bloom Time
May, June, July, August
Bloom Color
Yellow
USDA Zones
5-9
Catalog Number
OEN10F