Corn Silk
Zea mays stigma
About Corn Silk
Corn Silk (Zea mays stigma) is a herb used in the Indigenous / Native American tradition to help with UTI, Kidney Support, Edema, and High Blood Pressure. The aerial parts and leaves are the parts traditionally used, taken internally.
Parts used
Conditions addressed
Tea / Infusion
- Steep 1–2 tsp of dried Corn Silk in freshly boiled water for 5–10 minutes.
- Cover while steeping.
- Strain and drink.
Tincture
- Pack dried Corn Silk 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
- Grind dried Corn Silk into a fine powder.
- Fill size 00 capsules or stir into smoothies or honey.
Pregnancy, Breastfeeding & Children
No herb-specific pregnancy/child safety research is documented for Corn Silk in our references — the guidance below is based on its general effect category, not research on Corn Silk itself. Always confirm with a midwife, doctor, or pediatrician.
Pregnancy
Use CautionThis herb may affect blood pressure. Since blood pressure changes are a significant pregnancy risk factor (e.g. preeclampsia), herbs in this category are generally used only under medical supervision rather than self-directed — this is a general, mechanism-based caution, not herb-specific research.
Breastfeeding
Use CautionGenerally used cautiously during breastfeeding, particularly if the nursing parent is also on blood pressure medication.
Children
Use CautionBlood-pressure-active herbs are generally used cautiously in children and typically only under pediatric guidance.
Contraindications
- Pre-surgery — discontinue at least 2 weeks prior (potential antiplatelet effect)
- Significant kidney impairment — diuretic herbs may worsen renal function
Warnings
⛔ Heart & Blood Pressure Medications
May interact with antihypertensive drugs, blood thinners, or cardiac medications. Do not combine without medical guidance.
⚠️ Kidney Disease
Some diuretic herbs are contraindicated in those with kidney disease. Consult your doctor if you have impaired kidney function.
⚠️ 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
Diuretics, diabetes medications, lithium
Additive diuretic and blood-sugar-lowering effects.
Where to find in nature
Native region
North America
Climate
Varied — temperate to subarctic
Habitat
Prairies, woodlands, wetlands, and mountain meadows of North America
🌿 To see Corn Silk 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 Corn Silk, 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.