You can't realistically live off a garden unless it is full of potatoes and corn. It really is used to supply vitamins and minerals (assuming the soil is not depleted) to supplement hunting, fishing, and nut gathering. You also have to have a source of fertilizer or utilize slash and burn. The indians used junk fish which they buried next to their corn rows. My dad taught us that, and we did grow some prize corn using the method.
If you have an acre or two, and fill it with beans, potatoes, and corn, you have a shot. You really need to add protein and fat, like milk, fish, and meat, along with nuts if you have them, to do it right. Probably the simplest protein supplement is catfish, since they eat anything. You could even raise worms and throw them in your catfish pond to help fatten them up. Chickens are also traditionally used (eggs are a superfood, and old hens go in the pot) along with a milk cow.
Basically if there is a food shortage millions will die. The US is in good shape with food/fertilizer, so the main impact will be higher food prices, higher welfare checks, and an accelerated dollar death spiral.
Short term the dollar strengthens as the Fed tightens, but the Fed will have to give up within a year, if not months. Watch the Bank of Japan and the yen to see our future. The Chinese and Arabs will continue to outbid Americans for beef and pork (Chinese) when the dollar cracks and the foreigners sell off US debt to convert it to US food. This will make food inflation worse.
The first step in developing a survival mindset is to realize that your standard of living is going to drop, and getting over the psychological shock that will cause.
