Unfortunately, if you don't have ample access to free evergreen boughs, you'll have to either buy ready-made wreaths or make them from evergreen garlands, and as Gabby (aka @ houseinthebluff ...

then drape the boughs of fir around the holder, twining and interlacing them. The water should be only enough to keep the underside of the greens fresh. The wreath should be placed on a suitable ...