How long can you keep apple butter in the fridge?!
Answers: Until it starts going bad?
If it is sealed correctly it will last for years... I've had apple butter sit in my fridge after being open for months before I threw the jar away, eventhough it didn't look like it was going bad... it felt wrong to keep something in my fridge for that long.
Just keep an eye on it, and when it starts to grow hair, throw it out.
I do not eat apple butter..so i wouldn't know. i'm sorry.
As long, as you want to it will never spoil maybe just change colour. peace.