What are some LEGO Christmas trees designs I can build?
This is the design I created last year for the Winter Bash 2018 Building Competition.



It's very detailed and has many outward-facing studs to which decorations can be attached.

Here's some instructions for building the tree without decorations (note that many of the pieces are internal and do not have to be green).



(Click the image to view the instructions larger)

NOTE: In step 9, you will need to rotate some of the stems to avoid overlapping in order to attach them all.