I found this on the net...
MEXICAN SHELL
flower (Tigridia pavonia). Bulbs, all
zones. Blooms July and August. Each
flower lasts for only a single day, but a succession of
flowers prolongs the show to two to three weeks or more. And what a show! The 3- to 6-inch-wide blossoms have triangular outer segments in solid shades (white, yellow, apricot, pink, and red) and smaller inner segments and center cups with blotched or spotted patterns resembling exotic sea shells.
growing tips. Full sun near the coast, afternoon shade inland. For the best display,
plant bulbs in groups of 10 to 12. In rich, porous soil, set bulbs 2 to 4 inches deep and 4 to 8 inches apart. In containers,
plant six to eight bulbs in a 9-inch pot. Water regularly and feed every two weeks with a mild solution of liquid fertilizer. In mild-winter areas, bulbs can stay in the ground; divide them every three to four years. In cold-winter areas, let the foliage ripen, then dig bulbs and store.
Hope this helps!
Karen
