Vietnamese Mint
Vietnamese mint smells similar to Thai basil but it is far more pungent with a hot bite and slight numbing character and a strong alkalinity.
Also known as hot mint, it is the leaf to use in Malaysian laksa soups, and is often simply known as laksa leaf. It’s also used as a salad ingredient, and cooked dishes.
The pointed leaves are often marked with burgundy or purple-brown coloured smudges near the leaf base. It’s easy to grow and is best kept contained in a pot. Start it off as described above in Thai Basil. It will dry out and whither if it is not kept watered.