Is this Variety of Laurel winter hardy to Zone 5 or 6? I am asking because the online sources are sying it is hardy to zone 6; while today at a local plant nursery I was visiting today has it marked as hardy to Zone 5, which, if correct, means that this shrub can survive low temperatures down as low as -20 Degrees Fahrenheit. So is this Laurel Bush Hardy to Zone 5 or to Zone 6. FYI the USDA Hardiness Map revised in 2012 shows my location as being a Borderline Zone 5b/6a and the remainder of the city of Indianapolis is a Zone 6a, which means in an average winter, I can expect average extreme lows to dip to between -5 and -10 Degrees.
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