Hardiness zone is what everyone is used to referring to.
Sunset Climate is more like the EPA level 4 bioregions for the west coast and epa level 3 for the rest of USA.
Iterations are fine, we don't have to be perfect
My 2nd Location:Florida HardinessZone:10 AHS:10 GDD:8500 Rainfall:2in/mth winter, 8in/mth summer, Soil:Sand pH8 Flat
I've got no option but to sell you all for scientific experiments. Or a tiny ad:
Contemplate spending the next 20 years puttering in permaculture projects