Earthy oils possess extremely low volatility and heavy molecular structures, making them exceptional base notes that anchor volatile citrus and floral layers.
- Patchouli (Pogostemon cablin): Exhibits a deep, rich, earthy, musky, and slightly sweet-spicy balsamic wood scent that deepens with age.
- Vetiver (Vetiveria zizanioides): Delivers a deeply grounding, smoky, earthy, woody, and root-like aroma with sweet balsamic facets, serving as a primary fixative base note.