Step 1: Gather your supplies and tools
The amount of some of your supplies will vary depending upon how big you make your tree. I will list quantities of some of these for the tree I built in the pictures.
3 x 9 foot bundles of branching, bendable garland... the kind with short 3-4 inch branches.
1 x 18 foot piece of straight, plain "tinsel garland". I used about 10-12 feet. It needs to have the same color as the branching garland so it will match.
1 x wreath hanger (this will be partially visible) I used black to be less noticable.
1 x roll of wide masking tape.
1 x spool of 24 gauge green floral wire
1 x pack or spool of 18 gauge floral wire
1 x piece of foam core board or heavy cardboard (a 1 foot x 3 feet piece should be sufficient)
wire cutters or needle-nose pliers with cutters.
a knife (xacto, utility, etc. - something sharp for the foam core)
I really recommend eye protection while working with this fine wire. Throughout the project it will be sticking out in the air at eye level. 24 guage wire is not good for your eyeball. Also if you are not experienced and comfortable working with fine wire, you may want to wear gloves or you'll end up with bleeding fingertips.
You also need a door.
Step 2: Prepare the hanger
Prepare your hanger. You can simply place your wreath hanger over the door or you can make a modification. I wanted my hanger shorter so the top of my tree would be higher. This is optional.
Use pliers to bend the hanger where you want the top of the tree to hang and use tin-snips (or a grinder or something appropriate) to cut off the extra metal.