Hue cajeput oil is a famous product of Thua Thien Hue province. This is an indispensable gift of every visitor when coming to the ancient capital of Vietnam.

Hue Cajeput Essential Oil has a characteristic mild aroma (not strong, not bad-smelling), the scent keeps longer and doesn't stick on the skin after evaporation.

The characteristic of "Hue" Melaleuca oil products is due to the fact that Melaleuca trees in the geographical area are grown on Feralit soil and sandy soil, soils with high Fe and Mg2 + content (Fe content from 4.17 - 6.17 mg / kg, Mg2 + content from 1.0 - 2.96 meq / 100g), acidic soil (pH from 3.25 to 5.57) and poor nutrition, less humus (humus content from 0 , 78 - 4.13%).

Thua Thien Hue is the province with the most rainfall in the country, the average annual rainfall reaches 2,500 to 3,800 mm, higher than the national average with the rainfall from 1,500 to 2,000 mm. However, that heavy rain only concentrated in a short time from September to February next year. Between March and August every year, the main material Melaleuca harvest time in Thua Thien Hue, the number of rainy days in Thua Thien Hue province is about 59 days with an average rainfall of 612 mm, much lower compared with other geographical areas, such as Quang Binh, Quang Tri, Long An, Tay Ninh. This is one of the reasons why Hue cajeput oil has a higher Cineol content. This is consistent with the researches of the author Khuat Thi Hai Ninh (2009, 2016) 3, low rainfall in the dry season increases essential oil content and increases the rate of Cineol, and high rainfall in the rainy season reduces content.and reduce the rate of Cineol in cajeput leaves.

In the geographical area, from around March to August, people select branches and leaves with a length of about 30 cm, thick leaves, spicy on melaleuca trees over 4 years old to harvest (harvest 2 times / tree, the second time is about 3-4 months apart from the first time.