Made for my dear wife
Printed in ABS, no supports, acetone-bathed, glued, silver spray-painted.
Rigid and shiny!

You need 20x20cm work area of your heated bed to print this right sized.
Tree was split in two parts to made a whole thing a lot more durable and easier to print (easier than one-piece vertical)
Also this approach does not need any supports, so you don't need to clean and cut parts before acetone bath.
I did 1 minute acetone bath two times (with 20minutes break) to smooth surface. But as i want to keep this nice layered structure on a trunk, i stop at this point.
Parts glued with super-glue (you need to be quick when you connect glued pieces – you got about 2-3 seconds before bastards will snap to each other forever) I suggest you glue this in several iterations: main trunk, then child trunks (one by one) and then leaves. Child trunks and leaves – is quite flexible, so you could glue and align them with ease.
Silver coating was made with spraycan, just shake a can a lot before paint ))
Model was made in Blender, you could find .blend file at sources tab as well as whole .STL and parts STLs ready to slice&print.