Any suggestions for hardy sub-tropical fruits to grow in my zone?

[MoreRootsMoreFruits]

So apparently things are generally getting hotter every year? Any suggestions for hardy sub-tropical fruits to experiment with growing in my zone 8b in the UK? Interested in things for making refreshing juice drinks especially unusual or exotic flavours. There is generally a bit of humidity too often seemingly due to frequent contrail clouds.

 

[cntrlwagdnr]

You might try maypop passionflower, but you might need a regular caerulea as well for pollination. Also miniature hardy kiwis - no pollinator needed.

 

[MoreRootsMoreFruits]

Ah yes I remember hearing about that one. Thanks for the suggestions and the tips. I've been looking at the Koppen-geiger climate map for ideas of where to hopefully source interesting plant seeds from and other hardiness and precipitation maps etc.