Hay

What it is

Hay in perfumery is the smell of cut and dried grasses, not simply fresh green grass. Natural hay absolutes can be made from dried grassy material, and the exact botanical composition may vary.

One important reference is sweet vernal grass, Anthoxanthum odoratum, a coumarin-rich grass associated with the characteristic sweet smell of dried hay. The more specific name flouve is often used for Anthoxanthum odoratum material.

What to notice

Hay can suggest:

• sun-dried grass
• coumarin sweetness
• warm herbs
• tonka
• dry tobacco
• soft vanilla
• dried fruit
• dusty meadow warmth

The defining contrast is between fresh chlorophyll-like greenness and the sweeter aroma that develops after drying.

Hay and coumarin

Coumarin is central to the classic hay association and also links hay perceptually to tonka bean and fougère structures.

That does not mean every hay accord contains natural hay absolute. Synthetic coumarin can create a strong hay impression on its own or as part of a larger accord.

Keep flouve and generic hay distinct

Because “hay absolute” can refer to different dried-grass materials while flouve points more specifically toward sweet vernal grass, the archive should preserve the supplier or botanical description when available.