The Herb Prof Team researches and writes our herbal guides, drawing on published research, traditional herbal references, and hands-on growing experience.
The difference between basil and holy basil comes down to appearance, flavor, and use, even though both belong to the same plant family. Sweet basil, also called Ocimum basilicum, is a well-known culinary herb frequently used in Italian and Mediterranean cooking.
It has large, broad leaves with smooth edges, ranging in color from light green to deep purple, depending on the variety. On the other hand, holy basil, also known as Ocimum tenuiflorum or Tulsi, is a sacred herb in Hinduism, and practitioners widely use it in Ayurveda, a traditional system of medicine in India.
It has smaller leaves with serrated edges and a slightly fuzzy texture. Holy basil has a long history in Ayurvedic medicine, and early studies of tulsi extracts are promising for stress and mood. It isn’t a proven treatment for any condition.
While both basil and holy basil have similar fragrances, they have distinct differences in taste and aroma. Basil has a sweet, slightly peppery flavor with a hint of anise, while holy basil has a more pungent, spicy flavor with a hint of clove. Additionally, sweet basil is mainly a cooking herb, while tulsi serves as a tea and medicinal herb in India and a stir-fry herb in Thailand. If you’ve searched for tulsi vs basil, it’s the same question, because tulsi is holy basil.
Basil vs Holy Basil at a Glance
| Sweet basil | Holy basil (tulsi) | |
|---|---|---|
| Botanical name | Ocimum basilicum | Ocimum tenuiflorum (also written Ocimum sanctum) |
| Leaves | Larger, broad, and smooth; green to purple depending on the variety | Smaller and softly hairy, with serrated edges; green or purple |
| Stems | Usually green, purple in some varieties | Hairy; green or purple |
| Flavor and aroma | Sweet and slightly peppery | Peppery and spicy, with a clove-like aroma |
| Best known for | Italian and Mediterranean cooking | Tea, Ayurveda, religious use in India, and Thai stir-fries |
| Cultural role | A kitchen herb | Sacred in Hinduism |
| Growing | Warm-season annual | A tropical plant, grown as an annual in cooler climates; needs more heat |
How to Tell Basil and Holy Basil Apart
Look at the leaves and stems, then smell a crushed leaf.
- Leaves: Sweet basil leaves are larger, broad, and smooth. Tulsi leaves are smaller and slightly fuzzy, with serrated edges, and can be green or purple.
- Stems: Tulsi stems are hairy and can be green or purple. Stem color alone isn’t reliable, because some sweet basils, including Thai basil, also have purple stems.
- Smell: Sweet basil smells sweet and slightly peppery. Tulsi smells peppery and clove-like.
Species and Varieties
Knowing a plant’s family, genus, and species helps you tell similar herbs apart. Both belong to the mint family (Lamiaceae), known for square stems, opposite leaves, and two-lipped flowers. They also share the genus Ocimum, which has over 60 species of aromatic herbs and shrubs from tropical and subtropical regions.
The scientific name for holy basil is Ocimum tenuiflorum (also written Ocimum sanctum), and it’s also known as tulsi. It’s native to the Indian subcontinent, and Ayurvedic medicine has used it for thousands of years. Researchers describe three common types: Rama tulsi (green leaves), Krishna tulsi (purplish leaves), and Vana tulsi (a wild relative, Ocimum gratissimum). In fact, most studies don’t say which type they used, so research doesn’t back claims that each type has its own special benefits.
Sweet basil comes in many varieties, and its flavor and aroma vary by variety. Genovese basil is popular in Italian cuisine, with a sweet, slightly spicy flavor that suits pesto and tomato sauce. Thai basil has a stronger, more licorice-like flavor and is often used in Thai and Vietnamese cuisine. Lemon basil has a citrusy, lemon-like flavor and is often used in salads and marinades.
Flavor and Aroma Profiles
Sweet basil tastes sweet and slightly peppery, with a mild, herbaceous quality. It’s the flavor behind pesto, tomato sauce, and caprese salad. Tulsi is bolder: peppery and spicy, with a clove-like note, and it can overpower dishes built for sweet basil.
Also, basil’s fresh scent is popular in aromatherapy and essential oil blends. Tulsi is traditionally used in Ayurveda for relaxation, though that’s tradition, not a proven effect.
Culinary Uses
Cooking with Basil
Sweet basil is the herb for pesto, pasta, soups, and salads, and it’s the key ingredient in caprese salad (sliced tomatoes, fresh mozzarella, and basil leaves). Use fresh leaves for the best flavor, whole or chopped, in hot or cold dishes. Cooks use Thai basil, a sweet basil variety, in Thai curries, stir-fries, and soups.
Holy Basil in Traditional Recipes
In India, tulsi serves mainly as a tea and as a ritual and medicinal herb. In Thailand, where it’s called kaphrao, it’s a cooking staple, the key ingredient in pad kaphrao, a stir-fry.
Substitutes in Cooking
Thai basil or Italian (Genovese) basil can stand in for holy basil, but the dish will taste quite different. Tulsi is peppery and clove-like, Thai basil is sweet with an anise note, and Genovese is milder and lacks the clove-like taste. Lemon basil adds a bright citrus note. Still, for authentic pad kaphrao, use holy basil.
Health and Medicinal Benefits
Both herbs have a long history in traditional medicine, but tulsi has far more research behind it. In traditional Indian medicine, holy basil is used for coughs, colds, and other everyday complaints. Early studies of tulsi extracts are promising for stress and mood. However, the studies are small and short, and tulsi isn’t a proven treatment for any condition. Sweet basil is mainly a cooking herb, with no strong clinical evidence for medicinal use.
In the small amounts used in cooking, neither herb adds much in the way of vitamins or minerals. Tulsi is notably high in eugenol, the compound behind its clove-like aroma, but that’s a chemical difference, not proof of greater benefit. See our Tulsi Holy Basil Benefits guide for the evidence and safety cautions.
Companies also sell tulsi as capsules and tinctures. Doses in studies varied widely, so there’s no established dose. If you’re pregnant, take blood thinners or diabetes medication, or have a thyroid condition, read the safety section in our guide first.
Both herbs are steam-distilled into essential oils for fragrance. Essential oils are highly concentrated and aren’t meant to be swallowed.
There’s no evidence-based substitute for tulsi in medicinal use. Sweet basil isn’t the same plant as tulsi, and no research shows it has the same effects.
Cultural Significance
Holy basil, also known as tulsi, is considered a sacred plant in Hinduism. Many believe it is the earthly manifestation of the goddess Tulsi, whom devotees revere as a symbol of purity, devotion, and protection. According to Hindu mythology, Tulsi is the wife of Lord Vishnu, one of the most important deities in Hinduism.
In Hindu households, it is customary to have a tulsi plant in the courtyard or balcony. The plant is worshipped every morning and evening, and its leaves are used in various religious rituals. It is believed that having a tulsi plant in the house brings good luck and prosperity. Sweet basil has no comparable religious role in Hinduism.
Cultivation and Harvesting
Growing Conditions
Both are warm-season herbs that thrive in full sun and well-draining soil, and frost kills them. Tulsi is more sensitive to cold than sweet basil, so wait until the soil is warm before planting. In the tropics, tulsi is a perennial that can grow up to 3 feet tall, but in cooler climates it’s grown as an annual. Both can be grown from seeds or cuttings. Start seeds indoors about 6 to 8 weeks before the last frost date, and transplant the seedlings outdoors once they’re 4 to 6 inches tall.
When buying plants, look for healthy ones with vibrant green leaves and no yellowing, brown spots, or signs of pests, and check that the leaves have a strong fragrance. Choose plants suited to your growing conditions.
Harvesting and Storing
Harvest once the plants reach about 6 inches tall, and pick before they flower so they keep producing new leaves. Pinch off the leaves with your fingers or cut them with scissors. For tulsi, you can harvest the flowers too. Both herbs taste best fresh.
If you have extra, dry or freeze it. To dry, spread the leaves on a wire-mesh tray in a shady, dry, well-ventilated spot. Penn State Extension advises against hanging basil in bundles, since the leaves dry slowly and can mold. Dried basil loses some flavor and aroma, so it isn’t a perfect substitute for fresh. To freeze, chop the leaves, place them in an ice cube tray with a little water, and store the cubes in a freezer bag.
Before You Go
Sweet basil and holy basil (tulsi) are related but different plants. Sweet basil is sweet and slightly peppery, and it’s built for pesto and Italian cooking. Tulsi is peppery and clove-like, and it’s used in tea, Ayurveda, religious practice, and Thai stir-fries such as pad kaphrao. Use sweet basil for Italian dishes, and use holy basil where a recipe calls for it.
If you’re thinking about tulsi for health, remember that the research is early and the safety cautions are real. See our benefits guide before using it medicinally, and our comparison guide if you cook with it.
References
Little Herb Encyclopedia, by Jack Ritchason; N.D., Woodland Publishing Incorporated, 1995
The Ultimate Healing System, Course Manual, Copyright 1985, Don Lepore
Planetary Herbology, Michael Tierra, C.A., N.D., Lotus Press, 1988
Handbook of Medicinal Herbs, by James A. Duke, Pub. CRP Second Edition 2007
The Complete Medicinal Herbal, by Penelope Ody, Published by Dorling Kindersley
Sources
- Jamshidi, N., and Cohen, M.M. “The Clinical Efficacy and Safety of Tulsi in Humans: A Systematic Review of the Literature.” Evidence-Based Complementary and Alternative Medicine, 2017. [ncbi.nlm.nih.gov] → https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5376420/
- Penn State Extension, “Basil, A Summer Favorite.” [extension.psu.edu] → https://extension.psu.edu/basil-a-summer-favorite
- Simply Suwanee, “Different Types of Thai Basil and Their Uses.” [simplysuwanee.com] → https://www.simplysuwanee.com/types-of-thai-basil/
- Wikipedia, entry on Ocimum tenuiflorum. [wikipedia.org] → https://en.wikipedia.org/wiki/Ocimum_tenuiflorum
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Frequently Asked Questions
Is holy basil the same as tulsi?
Yes, basically Tulsi is the Hindi name for holy basil, so the two names describe the same herb.
What is the difference between tulsi and basil?
Tulsi is holy basil, so the difference is the same as holy basil vs sweet basil. Tulsi (Ocimum tenuiflorum) has smaller, slightly fuzzy leaves and a peppery, clove-like flavor, and people use it in tea, Ayurveda, and Thai stir-fries. Sweet basil (Ocimum basilicum) is the sweet, mild culinary herb used in pesto and Italian cooking.
What are the visual differences between basil and holy basil leaves?
Tulsi leaves are smaller and more oval-shaped, with a slightly fuzzy texture and serrated edges. Sweet basil leaves are larger and broader, with smooth edges and a range of colors from light green to deep purple, depending on the variety. Tulsi also has a hairy stem, while sweet basil has a smooth, hairless stem.
Can you highlight the health benefits of holy basil compared to regular basil?
Ayurvedic medicine has used tulsi for centuries. Early studies of tulsi extracts suggest possible effects on stress and mood, but the evidence is limited. Sweet basil is mainly a cooking herb, with no strong clinical evidence for medicinal use.
What are the distinct flavors of holy basil compared to Thai basil?
Holy basil is peppery and clove-like, while Thai basil is sweet with an anise or licorice flavor. Holy basil is the star of Thai stir-fries like pad kaphrao, and Thai basil is the traditional choice for green curry.
In what ways are the uses of holy basil and basil different in cooking?
Sweet basil is for Italian and Mediterranean dishes like pesto, tomato sauce, and caprese salad. Holy basil is used in Thai stir-fries such as pad kaphrao, and in India it’s best known as a tea.
Can I use holy basil instead of sweet basil?
You can, but it will taste very different. Holy basil is peppery and clove-like, so it can overpower dishes like pesto or caprese salad.
Why is holy basil also referred to as tulsi?
Tulsi is the Hindi name for holy basil. The plant is considered sacred in Hinduism, is often grown in Hindu households, and is used in religious ceremonies. In Ayurveda, it’s also known as “the incomparable one.”