Available in an array of colors, from white or yellow to deep purple or pink, calla lilies make an elegant hand-held bouquet for weddings, parties and other special events. Order the flowers from a florist in advance to ensure you get calla lilies in the right color. If you have calla lilies growing in your garden--they can grow in USDA hardiness zones 2 to 11 as an annual--make a bouquet using your flowers. Arranging a single bouquet should take about 30 minutes.
Trim the stems of the calla lilies to get them to the desired length. To choose this length, gather the flowers together and hold them in your hand. Then determine how many inches shorter you want them to be and trim them with scissors, working one by one.
Gather the calla lilies together. Turn the flower cups to all face the same way. If you're using more than one color flower, alternate the flower colors. When you're happy with the way the flowers look, it's time to secure the stems.
Wrap the stems together using waterproof tape. Start at the top of the stems and wind the tape around the stems at a slant angle until you've reached the bottom of the stems.
Camouflage the waterproof tape by wrapping the calla lily bouquet with either ribbon or large plant leaves (like ginger). If using ribbon, wrap the ribbon in the same manner you did the waterproof tape. Secure the ribbon at the top and bottom of the bouquet by using two to four small pins.
If using ginger leaves, wrap the leaf around the tape to hide it. Note any parts that stick out. Then remove the leaf and trim off those parts with a paring knife. Spray the back of the leaf with adhesive then wrap it as you did before. Hold the leaf in place until the adhesive sets.