Pathfinder magic items again: trees

I think the only reason I'd want to learn to grow magic plants is so I could grow
goodberry bushes
and
trees of knowledge.

Restful Birch are pretty cool too. Who doesn't want a good night's sleep? And Sheltershrub does Endure Elements for you, which is proper handy. Who needs a house, sleep in the snow, hope the spell doesn't wear off. And a Portal Oak looks like a plot hook, except it says it only goes a mile away. You'd need long lines of them for that to be handy. Still, pretend they reach further when they get older, have an old oak circle made of portal, seems grand.

But the main reason I want to grow plants
is to grow a tree of knowledge
and just laugh while I eat every day.