I have a world that has just transitioned into hard-mode. Stripes of Hallow and Corruption have both appeared in the world (as I expected), but the Hallow appeared right in the middle of my jungle biome (it even surrounds the Jungle Temple!).
Will the Hallow eventually destroy the jungle? I'm concerned that I won't be able to fight Plantera if it takes over the underground jungle quickly enough.
11 Answer
No.
Hallow can't take over jungle. The corruption DOES take your jungle over, so be aware of underground corruption slowly eating your jungle.