Production Method Essential Oils: The concentrated volatile oily compounds extracted from plants. This includes the top aromatic oil layer from steam distillation or extracts from other methods like cold pressing, CO₂supercritical extraction, or solvent extraction. Hydrosols: Also known as floral waters; the bottom aromatic water layer produced during steam distillation . It contains water plus trace amounts of aromatic molecules. Bach Flower Essences: Water that carrie