|This article is about a key from the Netflix series. You may be looking for the Thorn Key from the graphic novels.|
Sometime in the future, Kinsey and Tyler discover the memories when they hear the key calling to them. They realize that Duncan previously knew about the keys, and even get a glimpse into their father using the Ghost Key. They also find out that Rendell's friends — who supposedly died in the caves — did not actually die this way.
It is later revealed that Duncan witnessed Rendell killing Lucas after he killed their friends. They took away his memories and hid them somewhere nobody would find them, inventing the story that the children drowned and were washed away to sea.
The key allows the user to control plants. Rendell used it to hide Duncan's memories within the roots of a tree in Keyhouse's cemetery. Tyler and Kinsey then used the key to uproot the memories from the tree. Kinsey and Scot also use the key to film a scene for "The Splattering," where a vine wraps itself around Kinsey's leg and drags her across the ground.
- The Plant Key does not appear in the graphic novels; it was created specifically for the Netflix adaptation.