Szechuan pepper will grow there.
yeah many peppers and vegetables grow here but i dont want them
Just to clarify, zanthoxylym (the genus for szechuan pepper; which species is used is contentious and subject to political considerations) is a shrub/tree that is a fairly close citrus cousin.
It's completely different from both black pepper (piper nigrum) and chili peppers (capsicum).
Certainly deserves more press as it seems to be getting in continental Europe for its excellent pairing qualities, but I'm not sure it qualifies as a fruit.
-6C is what we have here in the part of Alabama where I'm planting stuff at the moment. I'm confident the Passiflora Edulis will come back from the roots when spring rolls around, but it and all of my mandarins and Meyer lemon, and limequat have all defoliated already during the first few frosts. Feijoa is looking great as is loquat. Some newer selections of strawberry guava and recent imports of Feijoa look like great choices and will be getting planted if I come across them.
One of my most exciting things to plant will be pears though, as I'm finding there are excellent selections which exist in nurseries, Asian and Euro types.
One thing I'm surprised hasn't been mentioned more frequently is Butia species.
I have a Butia capitata and a Butia eriospatha in the ground, and high hopes for both. Love the fruit from the selections I've found in California.