s. lowe wrote:For what it's worth, UC Berkeley did a study about urban foraging and after picking leafy greens at various places around the city they found that even leaves from right near very busy roads could be washed with water and safely consumed. Their main advice was to avoid roots and fungi because of accumulation of soil toxins but leaves seemed to only have surface contamination that could be washed off with water
Here's a story about the study with links
J Davis wrote:I wouldn't risk it personally.
But if you time it right, you could harvest seed heads and add that diversity to your property or a pot.