Sapling item turning into a vanilla thing

[Fuffles]

Dear Survivors,

I'm having troubles with creating a pinecone like item that should grow an already existing vanilla prefab, how would I do that? I cant find any mods with saplings

[blubuild]

You can also check out the code for the vanilla pinecone and see exactly how it works. \Don't Starve Together\data\scripts\prefabs\pinecone.lua would be the place to start. Then planted_tree.lua in the same folder.
Basically it's just that the pinecone creates a planted tree after the planting action, and the planted tree uses a timer component to do the replacement with an actual tree after a certain amount of time has passed. You can check it all out in detail in the files.