Gardens are only good if your in one place which I doubt will be the case if SHTF. You're more than likely going to be on the move unless you're already in a remote location and set up. Better know your wild edibles first and worry about gardens later. You'll want non- GMO seeds too, stick with
the old style seeds , so I've been told.
The third world country's will hardly notice a difference, and it will be bussness as usual for them. I'm not loosing any sleep over it, what happens ,,,, happens,, and hopefully I have enough preps in place to get by.