In a collapse situation I'm not ruling out anything, including sources of food and medicine! I've recently increased my efforts to learn foraging skills. Many of our indigenous plants can be eaten and/or used medicinally. I've even tried to incorporate some of these plants into my yard. Some plants are on purpose like passion flowers, turk's cap and elderberries; others not so much. You won't believe how many common weeds are edible! So never mind worrying about stockpiling Scott's Bonus S...you'll WANT those weeds to pop up for your daily salad!