Head to (I-9), to enter the heart-shaped room that extends from there to (J-8).
Check the mushroom patch at the intersection of (I-9) and (J-8), to get a mature scourshroom.
Note that you cannot use the mature scourshroom for the quest; you need one that hasn't been growing very long.
There are sound-aggro Defoliators and Diremites in this room. You should only need Sneak when harvesting. There are also chigoe-type mobs here that aggro through Sneak; you may need Invisible when walking through.
Plant the mature scourshroom in the mushroom patch found at the middle of the line between (I-9) and (J-9).
Now head to (E-7) and do the same for the mushroom patches located in that area. Pick from one patch a mature scourshroom and plant it in the other patch. This will allow you to get at least two mature scourshrooms to rank up.
Zone, wait until the game day changes and return to both mushroom patches to retrieve the mature scourshrooms.
It's best to pick during the morning hours, for a higher yield; you will typically get two young scourshrooms when picking between 4:00 and 6:00.
You will need to return to Abquhbah before you can pick/plant another mature scourshroom.
Note: You are still able to pick/plant another mature scourshroom at (E-7) without having to go back to Abquhbah.
If you cleaned it five times (the maximum), you will receive an added bonus of one Imperial Gold Piece.
Ensure you have inventory space prior to initiating the final cutscene, or you will be required to repeat the cutscene to complete the quest.
Game Description
Client: Abquhbah (Salaheem's Sentinels) Summary: Abquhbah has asked you to visit the weapon shop in his stead. His heavy sighs have you slightly worried...