Ah yes, Heirloom varieties. Now I think it would be downright silly to be in an apocalyptic environment and not have heirloom varieties of vegetables and the sort!
I know I for one already have just bucket-loads of different seeds, and a whole huge room full of plants ready to go out to the greenhouse. . . All heirloom.
That's another thing I think is a BIG must. If you consider, whatever happens, there is very likely (and for us West Coast people - already is) Radiation to be known of going around the globe. In that case, a greenhouse or two or three is a MUST - Not only does it allow plants you normally can't grow in your area to survive, but also allows you to eat food without getting radiation poisoning.
Out here in the northwest there's no way I could get such a harvest of tomatoes, melons, peppers, tomatillos, and tropical fruit without my greenhouses. . . But still, that aside, there's many more pros about them than just housing hot-climate plants.

I know I for one already have just bucket-loads of different seeds, and a whole huge room full of plants ready to go out to the greenhouse. . . All heirloom.
That's another thing I think is a BIG must. If you consider, whatever happens, there is very likely (and for us West Coast people - already is) Radiation to be known of going around the globe. In that case, a greenhouse or two or three is a MUST - Not only does it allow plants you normally can't grow in your area to survive, but also allows you to eat food without getting radiation poisoning.

Out here in the northwest there's no way I could get such a harvest of tomatoes, melons, peppers, tomatillos, and tropical fruit without my greenhouses. . . But still, that aside, there's many more pros about them than just housing hot-climate plants.