Holy Basil, also known as Tulsi or as the botanical Ocimum tenuiflorum and Ocimum sanctum is native to parts of Southern India and South East Asia. It is used extensively across India in the practice of Ayurvedic medicine and for spiritual purposes.
In Ayurvedic medicine it is know to help treat colds, headaches, stomach disorders, inflammation, heart disease, various forms of poisoning, and malaria.
As a food ingredient the dried herb is very popular in Thai cuisine where it is often called 'Thai Holy Basil' (known locally as kaphrao). You will find it in many traditional Thai dishes so look out for it when you next indulge in your favourite Thai dishes!
In aromatherapy Holy Basil purifies and cleanses the air and is thought to support our respiratory, nervous and digestive systems.
It can also be used as an 'energiser' in room diffusers it is thought to stimulate the creative receptors in the brain when working (a good one to sneak into the office!).
Given its typical high yields of eugenol, Holy Basil Oil may be compared as a cross between Clove and traditional Basil.
Vietnam’s 2026 basil season started under generally favourable conditions, with sunny weather supporting good crop development. Planting was largely completed by May, followed by the first harvest in June. Supply has been adequate so far, with only limited movement in prices.
Cultivation is concentrated mainly in the Red River Delta, with an estimated 120-150 hectares planted in 2025 and annual basil oil production estimated at around 20-30 MT. Several cuttings can be taken during the season, with the second and third harvests normally providing the strongest oil yields.
Further availability will depend on weather conditions between cuttings, which can influence both crop development and oil quality.
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