Educational reference only · Not medical advice
Botanical illustration of California Poppy

Eschscholzia californica

California Poppy

Papaveraceae

Evidence: InsufficientCaffeine Free North AmericaSafety information on file
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At a Glance

Common name
California Poppy
Scientific name
Eschscholzia californica
Family
Papaveraceae
Region
North America
Plant part
Aerial parts, Root
Caffeine
Caffeine Free
Evidence
Insufficient
Safety review
Safety information on file

Safety & Cautions

Safety information on file
Contraindications
Avoid in pregnancy and breastfeeding, and with CNS depressants or sedatives; discontinue before surgery; do not combine with prescription sleep or anxiety medications without supervision.
Drug interactions
May enhance sedative effects of CNS depressants and sleep/anxiety medications; consult a clinician.
Pregnancy
Avoid medicinal doses.
Children
Mild infusions acceptable in small amounts for short use; not a sedative for daily long-term use.
Allergies
Possible in those sensitive to Papaveraceae.
Known adverse effects
Generally well tolerated; large amounts may cause drowsiness or GI upset.

Botanical Description

A slender annual or perennial with finely divided grey-green leaves and cup-shaped four-petalled bright orange to yellow flowers on long stalks, followed by long slender seed pods.

Also known as: Copa de Oro, Golden Poppy, Cup of Gold

Historical Background

California's state flower, the California poppy has been used by Indigenous peoples of western North America as a gentle, non-narcotic relaxing herb for restlessness and troubled sleep. Unlike its opium-poppy relatives, it is a milder nervine with a long folk tradition.

Earliest recorded uses: Native American (especially California Indian) traditions as a gentle sedative and pain herb.

Traditional preparations:

  • Aerial-part infusion
  • Nervine sleep blend
  • Tincture (off-tea)

Traditional Uses

These uses document historical traditions and do not imply proven effectiveness.

Native American Traditions

Gentle sedative for restlessness, sleep, and mild pain; non-narcotic nervine.

Modern Herbalism

Relaxing nervine for children and adults; sleep support.

Flavor & Aroma

MildFloralGreenSlightly Bitter

Aroma: Mild, floral, green, slightly sweet

Tea Preparation

Preparation methods
Infusion
Steeping temperature
200°F (93°C)
Steeping time
10 minutes (covered)
Recommended vessel
Covered teapot
Blends well with
Chamomile, Lemon Balm, Passionflower, Valerian, Lavender
200°F (93°C) 10 minutes (covered)

Modern Evidence

Evidence level: Insufficient

California poppy has a folk tradition as a gentle sedative for sleep and nervous tension. Clinical evidence is insufficient; a few small trials and preclinical studies suggest mild relaxing effects, but it is not a treatment for insomnia, anxiety, or pain.

Evidence levels describe the state of research for the traditional use discussed here, not a recommendation. Historical use does not imply effectiveness.

References & Sources

  1. MSKCC · California poppy information (2022)
  2. PubMed · Eschscholzia californica anxiolytic review (2017)

Entry last updated August 4, 2026

Soothing Brews

An educational encyclopedia preserving the history, traditions, and modern evidence behind herbs used in teas and infusions. Inspired by antique botanical manuscripts.

Steeped in tradition, grounded in honesty.

Please Note

This is an educational reference, not a medical resource. Historical use does not imply effectiveness. Natural does not always mean safe. Consult a qualified healthcare professional before using herbs, especially if pregnant, nursing, or taking medications.

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Preferred sources: NIH ODS · NCCIH · MSK Herbs · PubMed · WHO · EMA · German Commission E · Cochrane