Knowledge about the zones and crops you wish to select… have you seen back to eden documentary, some things can also be grown in climates by certain practices such geo thermal heating by thick covering. So there is a lot of options. I would aim for biodiversity… and I fee you can do it in any climate, there is fruit and veggies that are native to whatever area they are native to. Every area seems to be resilient. There are people who have successfully grew tropical fruit trees in colder climates through various practices.
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