You’ll want to adjust the slot thickness on the base to fit the exact width of material you are using, this will ensure a snug fit when you go to assemble.
Apply glue to the tab of the tree. Fit the the tab on the palm tree piece to the slot on the base. Wait till glue is dry.
Drill pilot holes to both sides of the palm tree, approx. 10-11" from the base. Purchase 1 1/4" Hooks from your local hardware store and apply to the palm tree. Be sure the threads do not protrude the opposite side.
Apply paint/finish however you want!