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Thai basil

life science Maturity 11-13 Next article →

Thai basil is a distinctive plant native to Southeast Asia.

Thai basil with flowers
Thai basil with flowers

It is a specific variety of sweet basil, known scientifically as Ocimum basilicum var. thyrsiflora. This plant is highly valued for its unique culinary properties and strong aroma. Unlike many other herbs, it maintains its flavor well during cooking. It is especially stable under high or extended cooking temperatures. This makes it a preferred choice for hot dishes compared to sweet basil.

CroppedSweetBasilOrThaiBasil0314
CroppedSweetBasilOrThaiBasil0314

The physical structure of Thai basil is very specific. It is a sturdy and compact plant. The leaves are narrow, shiny, and green with slightly serrated edges. These leaves have a sweet scent that reminds people of anise or licorice. The plant also has a slight spiciness that sweet basil lacks. One of its most recognizable features is its purple stem. Because it belongs to the Lamiaceae family, the stem has a square shape. The leaves grow in an opposite and decussate pattern.

Thai basil flower
Thai basil flower

Flowers are a major part of the Thai basil's appearance. The plant produces flowers in a structure called a thyrse. This type of inflorescence, or flower cluster, is purple in color. When the individual flowers open, they appear pink. These flowers can be seen during the midsummer and late summer months.

Thai basil flower
Thai basil flower

The plant's scientific genus, Ocimum, comes from a Greek word meaning "to smell." This name is very fitting for a plant with such a strong scent.

There are many different types of basil, which can cause confusion. There are over 40 different cultivars in existence. Thai basil is sometimes called anise basil or licorice basil. In Vietnam, it is sometimes called cinnamon basil, though that name often refers to a different cultivar. In Taiwan, the plant is known as káu-chàn-thah. This name literally translates to "nine-storey pagoda." It is important to distinguish Thai basil from other common varieties used in Asia.

Thai basil with flowers
Thai basil with flowers

In Southeast Asian cooking, three main types of basil are common. First is Thai basil, also called horapha. It is a major ingredient in Vietnamese cuisine and is common in Western Asian cooking. Second is holy basil, or kaphrao. This variety has a spicy, peppery, and clove-like taste. It is very important in India for culinary, medicinal, and religious uses. Third is lemon basil, or maenglak. This type has scents and tastes with lemon undertones. It is the least commonly used basil in Thailand.

Thai basil plays a major role in many famous dishes. It is a frequent ingredient in Thai red and green curries. In Taiwan, it is essential for a dish called sanbeiji, or three-cup chicken. In Vietnam, raw leaves are often served as a condiment. People eat them with dishes like phở, bún bò Huế, or bánh xèo. This allows diners to season their food with the anise flavor. In Western countries, Thai basil is often used in dishes that traditionally use holy basil. This is because Thai basil is much easier to find in Western kitchens.

Growing Thai basil requires specific environmental conditions. It is a tender perennial, but most people grow it as an annual. As a tropical plant, it needs very warm climates. It is only hardy in USDA plant hardiness zone 10. This means it cannot survive in areas with frost. The plant needs fertile soil that drains water well. The soil pH should stay between 6.5 and 7.5. It also requires 6 to 8 hours of full sunlight every single day.

Thai basil with flowers
Thai basil with flowers

Gardeners can grow the plant from seeds or from cuttings. To keep the leaves tasting good, you must pinch off the flowers. If the flowers are allowed to grow, the leaves can become bitter. You can also harvest the plant repeatedly. By taking only a few leaves at a time, you encourage the plant to regrow. This periodic harvesting helps keep the plant productive for a longer time.

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File:CroppedSweetBasilOrThaiBasil0314.JPG
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File:Thai basil flower.jpg
Thai basil flower.jpg
File:Thai basil with flowers.jpg
Thai basil with flowers.jpg
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