The box cover is then secured with string or plastic strapping. Roses are often packed with ice in plastic bags or gel pack. In this case the roses are packed and stored vertically. Wet pack also is used for circium, gerberas, gypsophila larkspur, lilies, mini-carnations, and mixed bouquets. Wet packing is primarily restricted to flowers transported by highway trailer.
Many airlines restrict the use of ice and water.
Those that permit ice, require that it be packed in leak-proof containers, utilizing polystyrene foam or polyethylene film. Some flowers must be packed, or stored and transported vertically to prevent geotropic bending in which the plant tip orients itself away from the center of gravity. This is true for anemone, calendula, daffodils, freesia, gladioli, ranunculus, and snapdragon which will curve upward when placed horizontally. Florist greens are sometimes package-iced, in wax impregnated or polyethylene film lined fiberboard boxes. Wet newspaper or waxed paper also are used to provide high humidity.