Hi Sylvia, If those are the "blue" Freeisa laxa corms I sent in for PBS BX 302 then yes, they can grow in the ground, at least they can here. I thought I was zone 9b but other data indicates I am zone 10a. We do get frost, but only occasionally and it is light frost. I did grow a few out in the open garden last year, with light frosts, and at least 2 survived to bloom. Nearly all of mine I grow in terracotta pots under an arbor, protected from frost. I would not advise growing these out in the open. I keep harvesting more seed. If anybody has not gotten their fill of it yet I could send more to Dell. Mine send only one flower stem per corm so it is good to have a cluster in a pot. - Gastil Santa Barbara, sort of zone 9b but maybe 10a, depending which years are averaged.