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Oenothera macrocarpa - Missouri Primrose (photo credit: Missouri Botanical Garden)

Perennials

Oenothera macrocarpa or missouriensis

Missouri Primrose

Oenothera missouriensis (macrocarpa), or Missouri evening primrose, is a sprawling Missouri native plant featuring very large, 4-petaled, mildly fragrant, bright yellow flowers which open for only one day in the late afternoon and lasting overnight to dawn--attracting bees and butterflies, but is pollinated by the nocturnal sphinx moth.  Long spring to summer bloom period. Low and spreading, locate it in the front of a mixed border for best viewing!

Additional:

Missouri Native!

Missouri Primrose Growing and Maintenance Tips:

Easily grown in average, dry to medium, well-drained soil in full sun. Tolerates poor soils, drought and some light shade.

Height:

8-12 Inches

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Spread:

12-18 Inches

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Hardiness Zone:

3 - 7

Characteristics & Attributes for Oenothera macrocarpa or missouriensis

Exposure
Sun
Partial Shade
Soil Moisture Preference
Dry
Average
Attracts Wildlife
Butterflies
Critter Resistance
Deer Resistant
Season of Interest (Flowering)
Summer
Attributes
Native
Border or Bed
Naturalizing
Edging
Fragrant
Mass Planting
Drought Tolerant
Great Companion Plants for Oenothera macrocarpa or missouriensis
Blanket Flower Blanket Flower (Gaillardia aristata 'Arizona Sun')
English Lavender English Lavender (Lavandula angustifolia 'Munstead')
Blue False Indigo Blue False Indigo (Baptisia australis )
Coneflower Coneflower (Echinacea 'Hot Papaya')
Ornamental onion Ornamental onion (Allium 'Millenium')
Lamb's Ear Lamb's Ear (Stachys byzantina 'Helen von Stein')