Name: Alice Flat Rock, NC (Zone 7a) The beautiful Blue Ridge Mountains
Arlene, having lived on a barrier island for 20 years I envy you your microclimate. I am betting your soil temp is significantly warmer, I know that was the case where I lived. The ocean never went below 55 there so the ground water (and the ground) stayed at 55 also.
Minds are like parachutes; they work better when they are open.