I grow different types of basil in my Virginia garden and Thai basil is my favorite. Thai basil is a variety of sweet basil (Ocimum basilicum) but the flavor is spicier and more pungent — like anise and clove combined. I grow this warm weather annual for its use as a culinary herb and for its landscape value.
Thai basil gets its name from its popularity in Thai cuisine, but it is equally popular in Cambodian, Vietnamese, and Laotian cuisines. Thai basil can withstand prolonged cooking heat so the leaves work well with chicken or beef stir fried dishes. Thai basil also is used in Pad Thai, Vietnamese Pho, spring rolls, curries, and noodle dishes.
A more obscure use is Thai basil in refreshing drinks. To use Thai basil, first create a simple syrup. Combine one cup of sugar and one cup of water in a small saucepan. Add one cup of loosely packed leaves and gently mash them up against the side of the pot to release the oils. After bringing to a boil and simmering for 15 minutes, let the syrup cool, drain off the leaves, and pour the sweet, spicy syrup in a glass jar.
Add a few spoonsful of the syrup to a glass of limeade (made from a frozen concentrate). If you add a shot of gin, you will begin to see the many uses of Thai basil syrup in drinks such mojitos, gin and tonics, daiquiris, and martinis.
This flavor will also work well with citrus. For example, pour a few spoonsful over sliced oranges. Try adding spices such as cloves and cinnamon – maybe even cardamom – to make the flavor even more complex. Another option would be to either add the syrup or mince the Thai basil leaves on mango, pineapple, or papaya.
Because of their pretty flowers, Thai basil is used in vinegars. To make a vinegar, simply fill a glass jar with a 5 percent vinegar such as apple cider or white wine and add the flower heads and foliage. Let sit in a dark place for a few weeks. Drain off the foliage and leave the flower heads. These makes great gifts.
The flower spike can be used in fresh or dried floral arrangements. Basil flowers are made up of a calyx that dries and remains on the stem and the actual small flower inside, which eventually drops off after it has bloomed. This makes basil ideal for dried floral arrangements as well as potpourris.
I use Thai basil as an annual in the garden bed, just like any other annual. It adds a purple haze, similar to coleus, and tolerates our heat and humidity very well. I don’t pick the leaves, I just let it grow and flower in a mass.
Like other basils, this plant needs full sun and plenty of water in the summer. It is easy to start from seed after the average last frost when nighttime temperatures stay warm. Although we grow it as an annual, it really is a tender perennial that perishes with our fall frosts. As long as you keep it watered, Thai basil does well as a container plant.
There are several popular varieties of Thai basil. Cardinal has large, dark red flower heads with burgundy red stems and bright green leaves. Siam Queen, a 1997 All-America Selections winner, has large, dark purple-red flower heads and dark leaves. Everleaf Thai Towers is a columnar plant with delayed flowering. You can purchase it as a plant in local garden centers or grow if from seed. It is perfect for an accent piece in a tall container.
Thai basil is not prone to the downy mildew disease that affects sweet basil. I have never had a pest or disease issue although I have noticed that it is quicker to flower than the other basils. The solution is to have many plants, some for leaves, some for flowers or to purchase one bred to have delayed flowering like the Everleaf series. You can either pinch your Thai basil to prevent flowering and harvest the leaves or let the plants flower and use the flowers as a garnish, for flower arrangements, or for vinegars.
This plant is easy to find in local garden centers and seed catalogs. Thai basil is such a multitasking herb, it is worth growing every year.











