Various Artists - Infernal Proteus (A Musical Herbal) (2002)

Related:
Alio Die - Sit Tibi Terra Levis / Introspective (1990)
In Gowan Ring - Love Charms (1994)
Ah Cama-Sotz - Terra Infernalis (1999)
Apoptose - Nordland (2000)
Chaos as Shelter - In the Shelter of Chaos (2000)
Lotus Eaters - Alienist on a Pale Horse (2001)
Inade - The Incarnation of the Solar Architects (2009)

Your boy DEAR_SPIRIT is about to leave for a little over a week of touring with my band Rohit, so I'm gonna hit y'all with something special that should take a while to burn through. It's a phenomenal 4-disc compilation of songs by various darkwave, neoclassical, neofolk, and otherwise industrial-adjacent artists, each of which is meant to represent a different herb. What's that? Yes, marijuana is included -- Lotus Eaters are given the honor. Other artists include the rest of the above-linked, as well as Amber Asylum, RAIN, Troum, and a whole bunch more. Full track listing here. You're welcome.

1 - 2 - 3 - 4

You should also listen to:

Forseti -
Windzeit (2002)

Sieben -
Ogham Inside the Night (2005)

Ah Cama-Sotz - Terra Infernalis (1999)

Unsettling, industrial-leaning dark ambient from German artist Herman Klapholz. A slow-building storm-cloud of drifting synths, stabs of white noise, anxious drum loops, ghostly drones, cryptic spoken word passages, and various other otherworldly sounds.

Track listing:
1. Ce Carnage Démoniaque
2. Rite and Belief
3. Look for Graves with Holes in Them (L'Ame du Crime Remix)
4. Narbukh
5. Empty Souls
6. Vio-Lence and Vivi-Section
7. Look for Graves with Holes in Them
8. None of This Is True
9. Ill-Letrik
10. Zostrah

Empire of disease

You'll also like:

Deutsch Nepal -
Only Silence Among the Filthy !994)

Black Seas of Infinity -
AMRITA: The Quintessence (2007)