Leo, They adore summer heat, on conditions that it is dry. They do so well in sandy soil, becaude they do not tolrate excessive humidity. I think Ermurus himalaicus is best suitedfor warmer climats Greetings Lauw de Jager South of France http://www.bulbargence.om/ I hadn't realized they are fall-winter-spring growers. How tolerant are they of summer heat? I might try some from seed here in Phoenix.