Sometimes the locales described in the PHB just don't do it. Druids who learn to harvest the natural elements of the outer planes might gain new abilities. Here are some variant druid spell lists that druids connected to each of these planes are connected to. I will add to this in future.

Nine Hells

Druid spells from the Nine Hells focus on fire and deception. Many of these spells come from tiefling options and devil spell lists.

Gehenna

Druid spells from Gehenna focus on battle, stealth, and offense. These spells all come from yugoloth spell lists.

Hades

Many of these gloomy spells come from the night hag and Hexblade spell lists, for the worst parts of the Shadowfell often resemble the depths of Hades.

Canceri

Spells from Canceri tend to focus on restraint and imprisonment.

Abyss

Abyssal magic is by its nature corrupted and chaotic, and these druids might find a home in the jungles of Demogorgon's lair or among the slime of Jubilex.

Pandemonium

Limbo

Ysgard

Arborea

Strangely, most of the Upper Planes mirror Material Plane. So rather than a brand new spell list, let's go through the terrains appropriate for each plane, starting with Arborea.

Arvandor/Olympus: Forest (Arvandor), Mountain (Olympus)

Aquallor: Coast

Mithardir: Desert (Preferably) or Arctic

Beastlands

Krigala: Forest

Brux: Forest or Swamp

Karasuthra: Forest

Note that Circle of Stars, Circle of Dreams, and Circle of Moon druids are particularly appropriate for Karasuthra, far more than Circle of the Land druids.

Elysium

Amoria: Forest, Grassland

Eronia: Mountain

Belierin: Swamp

Thalasia: Coast

Bytopia

Dothion: Forest, Grassland (Preferably)

Shurrock: Forest (Preferably), Grassland

Mount Celestia

Lunia: Coast, Mountain

Mercuria: Grassland, Mountain

Venya: Grassland, Swamp, Mountain

Solania: Mountain

Mertion: Grassland

Jovar/Chronias: 

Arcadia

Albellio/Buxenus: Grassland, Mountain, Forest

Mechanus

We've almost completed the Great Wheel with what is perhaps the most unusual plane for a druid to come from who is not connected to the fomorians.

Archeron

Rounding out the Outer Planes, we have Archeron.

Elemental Plane of Air

 Elemental Plane of Water

Elemental Plane of Earth

Elemental Plane of Fire

Fountains of Creation (Plane of Magma)

Swamp of Oblivion (Plane of Ooze)

Note that this is a near copy of the Swamp Druid spell list, with a minor change.

Frostfell (Plane of Ice)

Note that this list is very similar to the arctic druid spell list.

Great Conflagaration (Plane of Smoke)

Quasi-Elemental Plane of Radiance

Quasi-Elemental Plane of Minerals

Quasi-Elemental Plane of Lightning

Quasi-Elemental Plane of Steam

Quasi-Elemental Plane of Salt

Quasi-Elemental Plane of Dust

Quasi-Elemental Plane of Ash

Quasi-Elemental Plane of Vacuum

Not sure I buy flame strike for the Abyss... otherwise, this looks pretty neat.

Quote from Thauraeln_The_Bold >>

Not sure I buy flame strike for the Abyss... otherwise, this looks pretty neat.

 You're probably right. I put it there because it's on the Fiend list for warlocks and seems appropriate, but looking back on it, I think I can do better. I think I'll replace it with contagion.

this is pretty cool but where is mechanus and why dont the upper planes get their own spell lists just because their kinda like real world places does not mean they dont got a theme or some weird stuff going on

and side note though i dont care about this as much have you considered inner planes

Quote from stuffattackknightofrandom >>

this is pretty cool but where is mechanus and why dont the upper planes get their own spell lists just because their kinda like real world places does not mean they dont got a theme or some weird stuff going on

and side note though i dont care about this as much have you considered inner planes

 Thanks for commenting!

I will get to Mechanus and Archeron, I just haven’t yet.

To me, the natural feel of the upper planes work well with druids, and anything else might make them step on clerical toes.

I hadn’t yet considered the inner planes, but now I think I’ll do them!