Cut one leg off of the pantyhose and fill it with potting soil. Tie a knot at the top of the hose to hold the soil in place. For a larger display, use multiple legs.
Stuff the leg or legs into a topiary wire ring.
Snip small holes in the hose with scissors and plant seeds or transplant small plants.
Water the hose-filled ring and place it in a bright spot out of direct sunlight.
Leave the hose on a horizontal surface until the plants establish roots in the soil. Once roots are established, you can hang the wreath.