i only know of the purple guy to the right of the coven’s refuge but his not always there:(
anyone know how to farm this thing?
Take the Gloomwald rift and head east, hugging the northern edge of the map. You should get to a spot where two of those rotting stumps or whatever will reliably spawn about a screenlength apart. Hitting them both takes under a minute and each of them can drop a bloom.
What is Ugdenbloom used for ?
One run through the Areas did give me like 15 Blooms. For what do you need them? 
need them for craft, what area?
farm those tree hero’s and those tree stumps, those gave me plenty of ugdenbloom
I guess its from Burrwitch to the altar of Rattosh. When I was first time exploring the area and did a full clear on normal it yielded me 11.
This is the route I farm:
nice catch, however this can be nerfed someday, it’s too easy to get blooms like that
Doing The Undergrowth seems a good source of them. Almost always a few heroes and Syl seems to have a 50%ish drop rate (in my admittedly limited experience) also a nice MI ring.
I run this route from the Gloomwald crossing rift, there are 5 rotting stumps which spawn 100%, and it crosses a few locations where the tree heroes can spawn, and you can meet some wendigo heroes as well, who can drop wendigo spirits. And at the end there are 2 Kubacabra spawn locations.
I cleared out all of the Ugdenbog and most of Gloomwald looking for Kupacabra, and got around 7-8 Ugdenbloom alltogether.
So Crate nerfed treasure troves to hell for being too reliable to farm and then add a component which can only be reliably farmed from specialized treasure troves.
What did they mean by this?
Really makes you think, doesn’t it?
I use the similar route, can get 5-6 Ugdenblooms if the run is lucky enough. I also have one for Ugdenbog, but it’s less reliable.
Dude with new update troves can drop other rare mats, I got 3 blooms from troves in SoT. Strange my fav bloom router is Ugdenbog, from portal go South then East, 6 spawns, I hate killing Kupa btw.
Best route is from Gloomwald Crossing rift, first turn to the left, keeping going that road on the left edge of the map untill you reach Caraxxus Foul lair, collect two stumps on your way, go just a little bit to the right - there is always an ornate chest there (sometimes heroic) with quite a few Ents spawning (sometimes heroes). Then go to Caraxxus Foul lair, and you can sometimes find some more Ent heroes (and get a drop from Caraxus). Fast and easy and you can combine it with Caraxxus Foul bonty if you need rep/infamy.
I’ll have to try a couple of these other routes, I’ve just been going from Coven, east into Ugdenbloom and then north and around west.
Nothing gets you to finally take care of your poison resists like those plants bombing you.
Between Hafuu’s routes in the Bog, Gloomwald, and Ancient Grove I managed to pick up like 13 blooms. Once you’re done just exit to the main menu and enter the game again, everything resets -> farm more blooms. It’s not half as painful as you think 