it takes 10 - 15 days

The acorns have to be placed ON grass with NO weeds. Click the block right above the dirt
and inorder for the trees to grow they need 2 Block spaces inbetween

| _ _ | _ _ | _ _ | Like that

And yeah 10-15 days

My acorn grown in 1 day....

each tree must have 3 blocks of space: 1 for the main part || and the other 2 for the
roots on sides...they usually take a day or less to grow

there might of been a update and they made a acorn grow in a shorter time into a tree ??

One acorn i put grew in less than 30 seconds ._.

I just planted it, walked untill it went off-screen, stayed like 15 seconds and when i
came back it was already a normal sized tree

which brings me to my next point don't smoke crack.