looking for tutorial on trees and shrubs

where can i find a tutorial in modelling a nice tree and shrubs?

camotech,

You really should be asking for tutorials in this thread

But before you do, have you searched for any in the tutorial forum?

I searched and found these:

http://blenderartists.org/forum/showthread.php?t=92116&highlight=tree
http://blenderartists.org/forum/showthread.php?t=81496&highlight=tree

There are many more, as well as free software / scripts for making trees
arbaro
ngplant
plant studio

Best of Luck!