Originally from Africa, Gloriosa lilies are beautiful, easy to grow, and will multiply. A splendid low climber, easy to grow. Grows 5-6 feet high, producing many lily-like flowers of exceptional beauty over an extended period. Also suitable for potting and long lasting cut flowers. Zone: 8-10 (can be dug and stored in other zones, or grown as a houseplant). Blooming size +

The Gloriosa Lilies are planted length ways like setting a pencil down on a table.  They like full sun to part shade, well drained soil and a fence/trellis/tree to climb on.
 
Plant them 1-2 inches deep.  You can go as deep as 4 inches if you are concerned that the bulbs may become exposed to the sun by soil/mulch washing away. I would NOT plant them any deeper than that.  Water thoroughly when first planted then soak the area twice a month if you don't have regular rain fall.