Lavender essential oil is obtained by steam distilling fresh lavender flowers. It is believed to be clear or pale amber in color. The second distillation will produce a more potent scent, but is less pleasant than the first. Its quality will decrease once harvested, so it is crucial to harvest it at the correct time. The right weather balance is important to ensure the highest quality. Extreme temperatures and winds will cause oils to evaporate, and prevent esters from forming.