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Holy Basil
Ocimum sanctum
Easy · Beginner friendlyAbout Holy Basil
Holy Basil or Tulsi is a sacred Indian perennial herb reaching 1-3 feet tall, with aromatic green or purple leaves and small pink-white flower spikes. Considered a sacred plant in Hindu tradition and grown in nearly every Hindu home in India. Used in Ayurvedic medicine for stress relief, immunity, and respiratory health, and in herbal teas. Increasingly grown in American gardens as awareness of Ayurvedic and adaptogenic herbs grows. Often grown as an annual outside tropical zones.
- Edible
- Fragrant
- Medicinal
- Pollinator-friendly
How to care for Holy Basil
Watering
- Springevery 5 days
- Summerevery 5 days
- Fallevery 7 days
- Winterevery 14 days
Soil · Rich & well-draining
- Top dressingCompost10%
- Main mixPotting soil + compost 3:180%
- DrainageGravel10%
Top up the compost layer each season.
FERTILIZER
Balanced Feed 14-14-14
An even feed covers all three needs at once, keeping leaves, roots and blooms moving together with nothing pushed out of balance.
- Nitrogen · Leaves
- Phosphorus · Roots + Blooms
- Potassium · Strength
- Springevery 30 days
- Summerevery 30 days
- Fallevery 45 days
At a Glance
- NativeSouth Asia, East Asia
- Height1.5–3 ft (0.5–0.9 m)
- Spread1–2 ft (0.3–0.6 m)
- Flower colorPurple, White
- Foliage colorGreen, Purple
- SoilLoamy, Well-drained, Rich
- LocationsYard · Balcony · Indoor
Bloom time
BLOOM CYCLE
Peak bloom
Jun–Aug
Small pink-white flower spikes through summer
Fragrance
STRONG FRAGRANCE
The flowers have a clove-like eugenol aroma.
Toxicity
Pets Safe
eugenol, rosmarinic acid, and ursolic acid
Not reported
EXPOSURE No exposure route is reported.
EFFECT No toxic effect is reported.
NOTE No human toxicity is reported in this catalog; avoid eating ornamental plants unless confirmed edible.
Safe
EXPOSURE No exposure route is reported.
EFFECT No toxic effect is reported.
NOTE Listed as non-toxic for dogs; avoid eating ornamental plants unless confirmed edible.
Safe
EXPOSURE No exposure route is reported.
EFFECT No toxic effect is reported.
NOTE Listed as non-toxic for cats; avoid eating ornamental plants unless confirmed edible.
Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.
DISTRIBUTION
- Native
- Introduced
- South Asia
- East Asia
History
Ocimum sanctum (correctly a synonym of Ocimum tenuiflorum per ICBN priority), commonly called holy basil or tulsi in Hindi and Sanskrit, is an erect aromatic subshrub in the mint family (Lamiaceae) native to the Indian subcontinent and tropical Southeast Asia. Carl Linnaeus described Ocimum tenuiflorum in 1753 in Species Plantarum, and later described Ocimum sanctum as a separate species in 1767—modern taxonomy synonymizes the names with tenuiflorum having priority, but sanctum persists in horticultural and Ayurvedic literature. Considered one of the most sacred plants in Hindu traditions, representing an earthly manifestation of the goddess Lakshmi and planted in courtyards of Hindu households for daily worship for over 3000 years.
In Ayurveda, tulsi is considered an adaptogen used for stress, respiratory ailments, and immune support. Three main cultivated forms exist: Rama tulsi (green), Krishna tulsi (purple), and Vana tulsi (wild).
Leaves are aromatic with clove-like essential oils (eugenol) and are used culinarily in Southeast Asian cuisine and brewed as tea worldwide. Cultivated for over 3,000 years in Ayurvedic medicine. Has become a staple of the modern American adaptogenic herb movement and tea industry.
Symbolism & meaning
What It Symbolizes
Holy Basil is sacredness made green. Kept beside homes and shrines, tended daily, and linked with the goddess Tulsi, it turns an herb pot into a devotional presence. Beyond ritual, its clove-scented leaves and bee flowers make it lively and generous. Its symbolism is household reverence.
- Sacredness — most revered plant in Hindu tradition
- Healing — central herb of Ayurvedic medicine
Where the Name Comes From
'Ocimum' from Greek 'okimon', the ancient Greek name for basil; 'sanctum' from Latin meaning sacred.
Uses & Fun Facts
- Clove-scented leaves and flowers perfume herb gardens and devotional plantings
Related plants
More Ocimum plants
Plants with similar care
Chinese AbeliaAbelia chinensis
Fragrant AbeliaAbelia mosanensis
Large-Flowered AbeliaAbelia uniflora
Glossy AbeliaAbelia x grandiflora
Frequently asked questions
How often should I water Holy Basil?
In summer, water about every 5 days; in winter, about every 14 days. Adjust for heat, pot size and drainage.
How much light does Holy Basil need?
Full sun: 6+ hrs direct. Watch the leaves — scorching or stretching means the light needs adjusting.
Is Holy Basil toxic to cats or dogs?
Pets Safe (Dogs Safe · Cats Safe) Educational information, not medical or veterinary advice. If exposure is suspected, contact a doctor or veterinarian.
Is Holy Basil easy to grow?
Yes — it is considered an easy, beginner-friendly plant.
Can Holy Basil be grown indoors?
Yes, it adapts well to indoor growing given the right light.
When does Holy Basil bloom?
It typically blooms Jun–Aug in the Northern Hemisphere.
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