How Many Varieties of Basil Are There? (150+ Explained)

By Michael Chen · January 24, 2026

There are over 150 recognized varieties of basil, with new cultivars continually developed through breeding and hybridization. These varieties belong primarily to the species Ocimum basilicum, but also include other Ocimum species such as O. minimum, O. tenuiflorum, and O. americanum. Basil types vary widely in leaf size, color, aroma, and growth habit, making them suitable for culinary, ornamental, and medicinal uses.

Understanding Basil Varieties: A Comprehensive Overview

Basil (Ocimum spp.) is one of the most diverse and widely cultivated herb genera in the world. Its popularity stems from its aromatic foliage, culinary versatility, and ease of cultivation. While common sweet basil dominates global markets, hundreds of unique varieties exist across multiple species.

Major Species Hosting Basil Cultivars

Ocimum basilicum: The primary species for culinary basils, including Genovese, Thai, and lettuce-leaf types.
Ocimum minimum: Dwarf basils often used in containers or as edging plants.
Ocimum tenuiflorum (Holy Basil): Used in Ayurvedic medicine and religious practices in India.
Ocimum americanum: Citrus-scented basils like lime and lemon basil.
Ocimum x citriodorum: Hybrids known for strong lemon or lime fragrance.

Popular Basil Types and Their Characteristics

Different basil cultivars offer distinct flavors, scents, and visual appeal. Below is a breakdown of well-known types grouped by flavor profile and use case.

Culinary-Focused Basils

Genovese Basil: Large, sweet leaves ideal for pesto and Italian dishes.
Sweet Basil: Classic home garden variety with mild anise-clove scent.
Thai Basil: Spicy licorice flavor; holds up well in high-heat cooking.
Lettuce Leaf Basil: Broad, crinkled leaves perfect for sandwiches and wraps.
Dark Opal: Purple-leaved variety adding color and mild spice to salads.

Aromatic and Specialty Basils

Lemon Basil: Bright citrus notes; excellent in teas, fish, and fruit salads.
Cinnamon Basil: Distinct cinnamon scent; used in Mexican and Southeast Asian cuisines.
Holy Basil (Tulsi): Peppery, clove-like flavor; revered in Indian culture for health benefits.
African Blue Basil: Perennial in warm climates with camphorous-minty aroma; attracts pollinators.
Spicy Globe Basil: Compact, bushy plant with intense heat; great for small spaces.

Classification and Diversity of Basil Cultivars

The number of basil varieties exceeds 150 due to natural variation and human-driven selection. Researchers and horticulturists continue to develop new hybrids that improve disease resistance, yield, essential oil content, and climate adaptability.

Variety	Species	Leaf Color	Height (cm)	Primary Use	Essential Oil Content (%)
Genovese	Ocimum basilicum	Green	60	Culinary	0.8–1.2
Thai Siam Queen	Ocimum basilicum	Green	75	Culinary	0.9–1.3
Dark Opal	Ocimum basilicum	Purple	45	Ornamental/Culinary	0.7–1.0
Lemon Basil	Ocimum x citriodorum	Green	50	Culinary/Aromatic	0.6–0.9
Holy Basil (Krishna)	Ocimum tenuiflorum	Purple-Green	70	Meditative/Medicinal	1.0–1.5
African Blue	Ocimum x kilimandscharicum	Green	120	Ornamental/Perfumery	1.2–1.8

Table data source:1, 2

The table illustrates key morphological and chemical differences among major basil types. African Blue exhibits the highest essential oil content, contributing to its strong aroma and insect-repellent properties. Holy Basil shows elevated oil levels linked to therapeutic compounds like eugenol and ursolic acid. Culinary basils like Genovese balance moderate oil content with palatable flavor profiles.

Growing and Selecting Basil Varieties

Choosing the right basil depends on intended use, climate, and growing conditions. Consider these factors when selecting a variety:

Key Selection Criteria

Intended Use: Cooking, tea, ornamental display, or medicinal extracts?
Climate Tolerance: Some basils tolerate heat and humidity better than others.
Disease Resistance: Look for cultivars resistant to fusarium wilt and downy mildew.
Space Requirements: Dwarf varieties suit containers; tall types need staking.
Harvest Frequency: Continuous harvest favors branching, fast-regrowth types.

Top Recommended Cultivars by Purpose

Best for Pesto: ‘Mintern Green’, ‘Aroma 2’ – high oil and robust flavor.
Most Heat Tolerant: ‘Rutgers Obsession DMR’ – bred for southern U.S. summers.
Pollinator-Friendly: ‘African Blue’ – flowers continuously and attracts bees.
Kid-Friendly Flavor: ‘Sweet Dani’ – milder taste with high lemon notes.
Indoor Growing: ‘Spicy Globe’ or ‘Pesto Perpetuo’ – compact and low-light tolerant.

Frequently Asked Questions About Basil Varieties

How many species of basil are there?

There are approximately 60 to 70 species within the genus Ocimum, but only a handful are commonly cultivated. The most important for agriculture and gardening include O. basilicum, O. tenuiflorum, O. americanum, and their hybrids.

What is the most popular type of basil?

Genovese basil is the most popular culinary variety worldwide, especially in Mediterranean cuisine. It's prized for its large, fragrant leaves and superior performance in pesto sauce.

Are all basil varieties edible?

Yes, all true basil varieties (Ocimum spp.) are considered safe for consumption. However, some ornamental types may have stronger, less palatable flavors. Always confirm the botanical name before eating unfamiliar plants.

Can I grow different basil varieties together?

Yes, you can grow multiple basil types in proximity, but keep in mind that some may cross-pollinate if allowed to flower. This affects seed viability but not the current season’s harvest. Maintain spacing for airflow to reduce disease risk.

Which basil variety has the strongest flavor?

Holy Basil (Ocimum tenuiflorum) and African Blue Basil typically have the most intense aromas due to higher concentrations of essential oils like eugenol and camphor. Thai Basil also offers a potent anise-spice profile favored in bold dishes.

In conclusion, while over 150 named basil varieties exist today, ongoing research and breeding expand this number annually. From kitchen staples like sweet basil to niche types like cinnamon or holy basil, each variety brings unique sensory and functional qualities. Understanding these differences allows gardeners and chefs to select the best type for their needs, ensuring optimal flavor, yield, and satisfaction.