I have had thoughts about how to grow in soil you can't test, both for collapse scenarios and for guerilla gardening
Sunflowers absorb toxins really well, are easy to find en masse as bird seed or for consumption (yes, both will grow), and can act as a living trellis, so those would likely be the basis. Following that, I know that fruits (in the botanical sense, not the culinary one) take in very little of the toxins in the soil compared to leaves, shoots, and roots, so those should be preferred
Something like a modified three-sisters method, with sunflowers replacing the corn and paired with any climber and any gourd, might work well. It'd end up being more foolproof and lower-maintenance too due to the synergy
@socalledunitedstates yes, but sunflowers are incredibly thirsty plants, as well. In the event of a climate crisis, where water isn't as easily accessible, you're immediately left at an extreme disadvantage. It depends a lot on what contaminants you're trying to deal with and the zone you live in.
Which, naturally, makes a catch all zine like this very difficult.
@socalledunitedstates speaking from knowledge and experience here one of the most valuable things you can learn is how to procure seeds from wild flowers. ESPECIALLY wild gradded. Prairie grasses, clovers, and fescues are phenomenal at fertilizing AND removing toxins. For example.
@socalledunitedstates I've done modified three sisters plantings with sunflowers replacing the corn, and they do in fact work very well! Morning glories, moonflowers, scarlet runner beans, etc. have gotten added to mine as well. The flowers draw in even more pollinators, and at the end of the season I was able to just set out the sunflower seedheads and let my ducks pick the seeds out themselves.
@socalledunitedstates Once the plants are mature, with ripe flowerheads bending the stalks and squash/bean vines helping wrestle them down, you tend to get really neat little tunnels that feel super nice to just hang out in. (See also: sunflower houses.)
Sunbeam City is a anticapitalist, antifascist solarpunk instance that is run collectively.