How Cold Hardy Are C. goeringii an C. ensifolia?
I'm looking to get some feedback from folks who grow these outside in the ground. I'm in zone 6B, but I have a very neat microclimate created by the intersection of a south facing brick wall that has a black slate patio at the base, and my asphalt driveway. I have a cultivar of Rosemary in the corner this created that is only supposed to be zone 8 hardy. It has survived the last 7 winters with no protection other than snow cover. Do I have a reasonable chance of keeping these plants long term in these conditions?
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