I realised yesterday that I'd completely forgotten about something...
Pyrethrums...
I need to plant some pyrtherums.
I bought a small pot with a seedling in it from a hardware store last week, thinking "Oh yes, one of these would be good to get", while I was stocking up on native ginger, plus getting a few other plants. I had forgotten about the usefulness of pyrethrums.... And the fact that they're annual, so they are not a set-and-forget plant... You need to make sure you have heirloom seed, rather than hybrid - PSHTF, you aren't going to be able to wander done to the local hardware store to get new plants. Hybrid seed is alright if you're not worried about propagating but, for prepping, you should only really deal with heirloom seed - seed that is going to grow you something that will give you seed that will grow next year's crop.
If you can't plant next year's crop from this years harvest, you better hope you won't need to.
Really.... Prepping is about more than making sure you have a year's worth of food stored away.
Pyrtherums are the source of pyrethroids - a very nice insecticide. Very low toxicity to vertebrates, although I wouldn't drink it.
This is why community is important... A well balanced prepper community can have hippies and survivalists - if they can base themselves on the skills they bring, rather than the philosophies that drive them.