General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Biennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Dry Mesic
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 8b
Plant Height: 2 to 7 feet
Plant Spread: 1 to 3 feet
Fruit: Showy
Fruiting Time: Fall
Flowers: Showy
Other: open in the evening till mid-morning
Flower Color: Yellow
Bloom Size: Under 1"
Flower Time: Summer
Underground structures: Taproot
Uses: Medicinal Herb
Salad greens
Will Naturalize
Edible Parts: Stem
Seeds or Nuts
Eating Methods: Raw
Wildlife Attractant: Bees
Other Beneficial Insects: Sphinx moths
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Propagation: Seeds: Provide light
Self fertile
Stratify seeds: 30 days
Suitable for wintersowing
Sow in situ
Start indoors
Other info: can only handle transplanting when seedlings are small
Pollinators: Moths and Butterflies
Miscellaneous: Tolerates poor soil

Common names
  • Common Evening Primrose
  • Evening Primrose
  • Common evening-primrose
  • Night Willow-herb
  • Hoary Evening Primrose

  • Posted by Sharon (Calvert City, KY - Zone 7a) on Nov 16, 2011 1:43 AM concerning plant:
    This plant is a North American native. Its yellow blooms exude a perfume that attracts the nocturnal sphinx moth, which pollinates it. It has been used by Native Americans for various ailments for years, but more recently it has become the focus of medical research. The plant may have an anti-clotting factor that would make it useful in the prevention of heart attacks. It has also been found that the oil of the evening primrose might help those who suffer from atopic eczema, asthma and from migraine. None of these drugs has been approved in the US, however.
  • Posted by sallyg (central Maryland - Zone 7b) on Jul 10, 2020 5:59 AM concerning plant:
    This plant works as a "trap plant" for Popillia aka "Japanese" beetles. I let these grow in a few places. When the beetles appear, they can often be found on the tallest clusters of leaves, in the morning or evening especially. This year I've already picked many dozens of beetles. I knock the beetles into a bowl of water, then give them to my chickens. Chickens love to eat the beetles.
  • Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Feb 24, 2018 8:26 PM concerning plant:
    It is a very common forb in meadows and prairie and seashore from southeast Canada into Florida to Arizona up into southern British Columbia. I've only seen it as a wild plant.
  • Posted by jmorth (central Illinois) on Oct 30, 2011 4:29 PM concerning plant:
    Flowers open at night, emitting a creosote aroma that night flying sphinx moths find very attractive. Yellow bloom has 8 yellow stamens.
    Indians ate the seeds and first year roots. Plant was introduced to Europe in early 1600's. Europeans ate the root and young shoots in salads.
    Flowers emit a creosote smell that attracts night flying Sphinx moths.
  • Posted by Mindy03 (Delta KY) on May 4, 2012 1:24 PM concerning plant:
    Honey bees get pollen from this plant.
Plant Events from our members
greene On November 19, 2014 Obtained plant
These are biennial but after the recent frigid weather a few of the first year rosettes have started to send up their 'second year' growth.
lizvero On June 12, 2019 Potted up
planted on the ground triangle 1,
WebTucker On October 4, 2021 Bloomed
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