@gaieus said:

No, this is not working. It's either not the same length or not at 45 degrees. I'll leave it to someone more knowledgeable.

It's probably due to the Earth being round instead of flat. We could blame Christopher Columbus. He's not here to defend himself anyway. 😆

Then there is always Vue trees, best used in Vue obviously.
However for a low detailed SU version it's doable. (1.7MB)

Coconut Tree V.png

Try this http://forums.sketchucation.com/viewtopic.php?p=252273#p252273