Damn you,Elden Ring, for your weird and wonderful side-quests.
This quest will take you across the Lands Between, and the Seedbed Curses themselves are often well hidden.
After that, the Dung Eater will wish for you not to disturb him.

This will continue until you get your hands on your first Seedbed Curse (more about this below).
He’ll give you the Sewer-Gaol Key to aid in your journey.
If you go here, then the Dung Eater will invade your world and fight you.

In the next room is a Perfumer you could defeat.
There is also a ladder in this room on the right-hand side.
At the very end of this cellar is another corpse and a Seedbed Curse.

From here, jump down again and run along this platform, then jump up onto the other slope.
Run up to the top, turn right, and head to the end of the path.
There you’ll find yet another corpse and Seedbed Curse.

Jump down onto the platform below you, then over the fence onto the beam.
You’ll see another small platform below with a door into a dark room.