Oenothera missourensis Evening Sun

Scientific Name : Oenothera missouriensis

Common Name : Missouri evening primrose

Hardiness Zone : 5a - 9b

Hardiness Degree : -20°F (-29°C)

Blooming Season : Spring, Late Spring, Summer

Plant Habit : Spreading

Characteristics : Attracts Butterflies, Deer Resistant, Drought Tolerant, Rabbit Resistant, Colorful/Attractive Foliage, Fragrant Flowers, Low Maintenance

Water : Light

Fertilizer : Once a month

Spacing : 17 - 19" (43 - 48cm)

Height : 3 - 6" (8 - 15cm)

Width : 15 - 18" (38 - 46cm)

Exposure : Sun

General Information : Bright yellow flowers on silvery green foliage – flowers open in the afternoon and bloom throughout the night, attracting butterflies and moths. Tolerates a wide range of soil types; drought tolerant and low maintenance.

Idea & Tips : Plant in a bright, sunny location with well-drained soil. Fertilize as needed.

Grower Information : Bright yellow flowers create striking displays against silvery green foliage.

Flowers open in the afternoon and bloom throughout the night, attracting butterflies and moths.
North American native is tolerant of a wide range of soil types.
Drought tolerant once established and low maintenance.
Requires less chemicals and features less shrink for simplified production.

PA State University Trials Best of Species

'Evening Sun'

Protection Information : PP35,065

(Flowering Only License)

Breeder : Darwin Perennials

Propagation Guide
- Media EC/pH:
  
  EC 1.2-1.5 mmhos/pH 5.8-6.2
  
  Soil Temperature:
  
  70-72°F (21-22°C)
  
  Rooting Hormone:
  
  1,000 ppm IBA
  
  Mist:
  
  Low to moderate
  
  Fertilization:
  
  50 ppm N when roots become visible
  
  Pinching:
  
  Benefits from one pinch prior to transplant.
  
  Transplanting:
  
  42-45 days after sticking
  
  Comments:
  
  Don't oversaturate the media. Remove from mist once root initials are visible.
Finishing Guide
- Media pH:
  
  5.8-6.2
  
  Temperature:
  
  Nights: 55 to 65°F (13 to 18°C) Days: 65 to 75°F (18 to 24°C)
  
  Light Level (fc):
  
  5,000 to 8,000
  
  Vernalization:
  
  No
  
  Daylength:
  
  Day length neutral
  
  Watering:
  
  Allow media to dry slightly between watering.
  
  Fertilization:
  
  Use a balanced fertilizer at a rate of 100 to 150 ppm.
  
  Pinch After Transplant:
  
  Typically not required
  
  Plant Growth Regulators:
  
  PGRs generally not needed
  
  Pests and Fungal Diseases:
  
  Watch for crown rot if overwatered.
Crop Scheduling
- 1–qt. (10–cm) pot, 1 plant per pot:
  
  6-8 wks
  
  1–gal. (15–cm) pot, 1 plant per pot:
  
  10-12 wks
  
  2 to 3–gal. (25 to 30–cm) pot, 3 plants per pot:
  
  12-14 wks
  
  Bloom Months:
  
  March to October

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