At 4/21/2007, you wrote:
Heartwood, extreme southern Missouri, was always cusp 6a, 6b. Looks
like we are sliding into 7. I like it for gardening season extension.
Will report later on how it fits with summer heat tolerance. Suspect
precipitation will also change. This last year was up by about
fifteen inches.
I asked someone there who has kept records and her response was that there
has been a definite warming and movement into zone 7.
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