Thymus vulgaris essential oil is one of the most common oils used mainly in food industry
but it could also have applications in medicine and pharmacy. The chemical composition
of this essential oil depends on the plant material harvesting time, phenomenological
stages, meteorological conditions and growing area of plants. In our study, four different
Thymus vulgaris L. var. Donne Valley essential oils have been extracted and characterised.
The essential oils have been extracted from plants before and after flowering in two
different years. There is an important difference between the chemical composition
of oils obtained from plants harvested before and after flowering. Thymol and carvacrol
have been found as the major components, but the percentage depends on the phenological
stages of the plants and the year of harvesting. Furthermore, the composition of the
minor components changed.