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Annual (11)

USDA Hardiness Zone 7, even 6b. The plant tolerates low temperatures (-15° C even -20° C), it can be covered by snow for months (1 - 8 months). (1)

USDA Hardiness Zone 8. The plant tolerates low temperatures (-8° C), can tolerate occasional snow cover for up to a couple of weeks per year. (1)

USDA Hardiness Zone 9. The plant does not tolerate snow, but can tolerate occasional freezing spells of about - 5° C (the typical morning frost of central Chile). (5)

USDA Hardiness Zone 10 and 11. The plant does not tolerate freezing. (4)