Cover a floral foam wreath in lightweight, gauzy material if desired. Use a wreath in either a circular or heart shape; lightweight fabric is necessary as you are pushing pins through it and the foam. Secure the ends of the fabric to the back of the wreath with hot glue.
Arrange your flowers as desired on the wreath before attaching the flowers to the foam, though the arrangement should feature some type of symmetry. Make a few arrangements if desired and take photos to determine which you like best. Use garlands or other applicable filler material, such as feathers, around the outside edge of the wreath to create the "spray" effect.
Attach the flowers to the foam with greening pins; use the greening pins over the individual stems of each flower. Place flowers with longer stems on the inner sections of the wreath, unless you want the stems to be visible. Another option is to trim the stems as desired.
Fill in any bare spots as needed with appropriate flowers or filler material. Apply spray-on glitter to the arrangement if desired, then place it on an easel for display purposes.