🔱Siddha Medicine

Kaattu Tulsi (Forest Basil)

Ocimum gratissimum

About Kaattu Tulsi (Forest Basil)

Kaattu Tulsi (Forest Basil) (Ocimum gratissimum) is a herb used in the Siddha Medicine tradition to help with Fever, Cough, Respiratory Issues, and Digestive Issues. The leaves and seeds are the parts traditionally used, used both internally and topically.

Botanical background

Ocimum gratissimum, also known as clove basil, African basil, and in Hawaii as wild basil, is a species of Ocimum. It is native to Africa, Madagascar, southern Asia, and the Bismarck Archipelago, and naturalized in Polynesia, Hawaii, Mexico, Panama, West Indies, Brazil, and Bolivia.

Source: Wikipedia, via iNaturalist

Parts used

Leaves · bothSeeds · internal
🍵

Tea / Infusion

1–3 cups daily
  • Steep 1–2 tsp of dried Kaattu Tulsi (Forest Basil) 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 Kaattu Tulsi (Forest Basil) 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 Kaattu Tulsi (Forest Basil) into a fine powder.
  • Fill size 00 capsules or stir into smoothies or honey.
♨️

Steam Inhalation

1–2× daily during acute symptoms
  • Add 2–3 tbsp of Kaattu Tulsi (Forest Basil) to a bowl of just-boiled water.
  • Drape a towel over your head and inhale steam for 5–10 minutes.

Contraindications

  • Pregnancy & breastfeeding — insufficient safety data; consult your doctor
  • Children under 12 — therapeutic dosage not established

Warnings

⚠️ Pregnancy & Breastfeeding

Safety during pregnancy and breastfeeding has not been established for most herbal remedies. Consult your midwife or doctor before use.

⚠️ 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.

Where to find in nature

Native region

South India, Sri Lanka

Climate

Tropical

Habitat

Tropical forests, coastal areas, and medicinal gardens of Tamil Nadu and Sri Lanka

🌿 To see Kaattu Tulsi (Forest Basil) 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

  • South Indian grocery stores
  • Siddha and Ayurvedic medicine suppliers
  • Health food stores (Whole Foods, Natural Grocers, Holland & Barrett, GNC)
  • Naturopathic clinics and integrative medicine practices
  • Specialist herbal apothecaries and herbalist practices

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 Kaattu Tulsi (Forest Basil), 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.