Cut the floral foam to fit the swag form. Use a tautly stretched piece of wire to slice or cut carefully with a knife. You do not need to shape the foam to fit perfectly, as the flowers will naturally follow the curve of the swag and cover the foam.
Attach the foam to the swag form using the floral tape. Carefully cut the tape to the desired length without letting it touch anything. Floral tape is quite sticky. Wrap the tape around the foam and the form, securing them together on both sides.
Trim the stems off of the flowers if necessary, making sure you leave enough length to fit securely into the floral foam. Less is not more in this project, so be sure to have lots of flowers at your disposal. Also remember to leave some of the leaves, as they add a touch of realism.
Insert the flowers into the floral foam at least 3 to 4 inches. Shape and design your swag until the overall effect pleases you. A full arrangement is nicer than a sparsely created one, so don't be shy with the flowers.
Hang the swag wherever the flowers will brighten your day.