Question: Is Hemerocallis 'Golden Zebra' hardy in Zone 5? According to Wayside, it can be grown in Zones 4-9. According to Plant Delights, it can be grown in Zones 5-9. I just discovered on the Monrovia tag that it is hardy only in Zones 7-11! I bought one plant at Wayside and another at Green View Nursery. I was assured the 'Golden Zebra' would over-winter in Zone 5. Please explain the inconsistency. Thank you.
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