The conducted study attempted to link the kinetics of convective drying of lavandin flowers with the quality of the obtained raw material determined by essential oil content, in order to optimize the process. The flowers were dried under natural convection conditions as well as in laboratory dryers with forced drying agent circulation under varying temperatures and periodical time of operation of the heating element in a continuous and intermittent mode. During the drying process, mass changes of the dried material were recorded. Essential oils content was determined using the hydrodistillation method with the use of Clevenger apparatus. For description of the kinetics of water content change, a model resulting from solution of a one-dimensional mass diffusion equation resulting from the Fick’s second law under preset initial and boundary conditions was used. A high matching coefficient of the model with the empirically obtained results was determined. Lavandin drying was conducted during the drying rate decrease stage in each of the established drying conditions. The highest amount of essential oils was observed in lavandin flowers dried under intermittent process conditions with initial temperature of 40°C, which was then decreased to 35°C, and with only cyclical provision of heat at 45-minute intervals.