From Diablo 4 Wiki

Plants are used to craft Elixirs, Incense and upgrade your health potions at the Alchemist.

Plants can be found anywhere in the world. They are usually found at the roadside or the edge of a mound or clump of trees, rarely growing in the middle of open areas.

A strange feature but plants can be crafted into different plants at the Alchemist.

Type Quality Description Found in Cost to Craft
Biteberry Magic A herb used in the crafting of potions, elixirs & incense.

A hard, bitter berry prized by alchemists for its use as both an enduring raisin and its vital and defensive qualities.

Fractured Peaks. 5 Gallowvine
200 Gold