Birch's sap

Birch's sap is a miscellaneous quest item in Fallout 3.

Location
Given by Tree Father Birch to use in the Oasis quest to stop Harold, the FEV victim with a tree growing out of his head, from growing beyond Oasis and entering the Capital Wasteland. If the quest is completed in Leaf Mother Laurel's favor, this item can either be kept or used as Rock-It Launcher ammunition.

Related Quests
Oasis