Wrap the lamp post with the evergreen garland. Start at the top at the crosspiece and loop the garland around several times so that it does not slide. Then wind it down the lamp post. You can put the loops close together so that your entire post looks like it is evergreen, or leave some of the metal showing through.
Use the decorate garden stake or rock to hold the bottom of the garland and any extra in place. You can wrap any excess around the bottom of the lamp post. Then drive the stake through the garland so that it will remain on the ground.
Wrap the twine around the top crosspiece in an X. This will hold the top of the garland in place.
Hang the wreath on the crosspiece. Wreaths are ideal decorations for lamp posts because you can add ribbons, lights or other holiday decor and remove them once the season is over. The wreath should hang over both short pieces of the cross with the post extending up through and behind the wreath.