For lavender growers, turning lavender into essential oil is the culmination of a year's work. Lavender, which only flowers once a year, must be distilled when fully ripe. The lavender growers count the number of flowers per ear and rub them between their fingers to determine if the moment is favorable. The quality of the distillation water being essential for the quality of the essential oils and hydrosols obtained, the lavender growers favor rainwater distillation. The distillation time is relatively short (30 to 40 minutes), and the process stops when there is no more perfume in the plant and only water remains in the essencier.