The natural season for flowering of Asiatic lilies is late spring and early summer.
Oriental lilies bloom naturally in late summer.
Asiatic lily bulbs can be stored in coolers for forcing virtually year-round by freezing the bulbs. Oriental lilies, except for a few cultivars, cannot be stored for more than nine months. Therefore, they are scarce to come by during January, February and March. Although availability of Asiatic bulbs is now almost year-round, hybrid lilies are primarily marketed from February through May and particularly for Easter and Mother's Day. Hybrid lilies are not difficult to grow as potted plants if a few basic cultural requirements are adhered to.