🌿Western Herbalism🪶Indigenous / Native American

Evening Primrose

Oenothera biennis

About Evening Primrose

Evening Primrose (Oenothera biennis) is a herb used in the Western Herbalism and Indigenous / Native American traditions to help with Eczema, Hormonal Imbalance, Menopause, and Inflammation, among 2 other conditions it addresses. The aerial parts and leaves are the parts traditionally used, used both internally and topically.

Botanical background

Oenothera biennis (common evening-primrose, evening star, sundrop, weedy evening primrose, German rampion, hog weed, King's cure-all, or fever-plant.) is a species of Oenothera native to eastern and central North America, from Newfoundland west to Alberta, southeast to Florida, and southwest to Texas, and widely naturalized elsewhere in temperate and subtropical regions. Evening primrose oil is produced from the plant.

Source: Wikipedia, via iNaturalist

Parts used

Aerial Parts · bothLeaves · both
🍵

Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Evening Primrose in freshly boiled water for 5–10 minutes.
  • Cover while steeping.
  • Strain and drink.
💧

Tincture

20–40 drops in water, 2–3× daily
  • Pack dried Evening Primrose into a jar and cover with 40–60% alcohol.
  • Seal and steep for 4–6 weeks, shaking daily.
  • Strain and store in a dark dropper bottle.
💊

Powder / Capsule

500 mg – 1 g, 1–3× daily
  • Grind dried Evening Primrose into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
🖐️

Topical / Poultice

1–2× daily as needed
  • Mash fresh Evening Primrose or mix the powder with a little water to form a paste.
  • Apply to the affected area for 20–30 minutes.
🫙

Infused Oil

Massage into affected area 1–2× daily
  • Fill a jar with dried Evening Primrose.
  • Pour over a carrier oil until submerged.
  • Leave for 4–6 weeks, then strain.
  • Use topically or as a salve base.
🛁

Herbal Bath

2–3× per week as needed
  • Brew 4–6 tbsp of Evening Primrose in 1 litre of hot water for 15 minutes, strain, and add to a warm bath.
  • Soak for 20–30 minutes.

Pregnancy, Breastfeeding & Children

Pregnancy

Use Caution

Sometimes used late in pregnancy (after 37 weeks) under midwife guidance to help ripen the cervix, but earlier use is generally avoided since it may stimulate contractions prematurely.

Breastfeeding

Likely Safe

Commonly used for its essential fatty acid content; no significant concerns documented at normal supplement doses.

Children

Use Caution

Sometimes used under guidance for skin conditions in older children; not typically self-administered to young children without practitioner input.

Contraindications

  • Hormone-sensitive conditions (breast/ovarian cancer, endometriosis) — phytoestrogenic activity possible

Warnings

⚠️ Allergic Reactions

Discontinue immediately if you experience rash, itching, swelling, or difficulty breathing.

⚠️ Not Medical Advice

This information is for educational purposes only. Always consult a qualified healthcare provider before using herbal remedies.

Drug & herb interactions

Anticonvulsants

May lower the seizure threshold.

Blood thinners

Mild antiplatelet activity.

Where to find in nature

Native region

Europe, North America, Australia

Climate

Temperate

Habitat

Meadows, hedgerows, woodland edges, and cottage herb gardens

🌿 To see Evening Primrose growing, visit botanical gardens, university plant collections, or specialist herb nurseries near you. If foraging in the wild, always work with an expert identifier — never consume a plant you are not 100% certain of.

Where to buy

In store

  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices
  • Farmers markets with herb vendors

Online

iHerb

Wide selection of standardised extracts, capsules, and powders with lab testing

Mountain Rose Herbs

Premium bulk dried herbs — certified organic, ethically sourced

Starwest Botanicals

Large selection of certified organic bulk herbs and powders

Herb Pharm

High-quality liquid extracts and tinctures, rigorous quality standards

Amazon

Convenient — verify brand certifications and check third-party testing

Etsy

Small-batch artisan herbalists, hand-harvested and wildcrafted herbs

Quality tips

When buying Evening Primrose, look for: certified organic labelling, clearly stated country of origin, third-party lab testing for heavy metals and pesticides, and a batch expiry date. Standardised extracts offer consistent dosing; bulk dried herbs are more economical for regular use. Avoid very cheap, unlabelled products — quality varies enormously.