While the zone categorization is a useful guideline, individual gardens may vary.
Are you next to a large body of water, which can moderate temperatures?
In a frost pocket?
Exposed to winds from the north (wind chill can bring the temperature down considerably)?
Do you wrap your plants when sub-freezing temperatures are forecast?
A good way to assess what will and won't survive is to look at what your long-term resident neighbors have been growing.
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