Stirring Swamp is one of three main areas that is a part of Weirding Woods in Plants vs. Zombies: Battle for Neighborville.
Stirring Swamp at the Top of the Map
Stirring Swamp is located in the northernmost part of Weirding Woods. It's terrain mainly consists of swamp. If a player touches the swamp (unless they have put the forest to sleep), Dreadroots will spawn.