While strolling through my neighbourhood, I recently came upon two rogue edibles, a basil plant and an amaranth that had escaped from front yard gardens nearby only to make a go at life in soiless conditions.
I found the basil growing in a crack between the curb and the road. An attempt to rescue it failed. That plant was rooted in there solidly! Basil are not the most forgiving herbs and can be a bit finicky about soil nutrition and water, so this find was a surprise.
I spotted the amaranth a few streets over growing out of the space between sidewalk blocks. This find comes as no surprise as amaranth can withstand a lot and their seeds (which are many) have the ability to scatter far and wide.