Yeah, do NOT plant stuff you intend to eat in your yard without testing the soil first, people. The stuff we put on crops and that we dig out of the ground is shockingly toxic and persistent. Sunflowers are a great way to remediate the soil, although you may need multiple years of planting and disposal.
It could be former industrial or agricultural land.
So unrestored nature.
Yeah, do NOT plant stuff you intend to eat in your yard without testing the soil first, people. The stuff we put on crops and that we dig out of the ground is shockingly toxic and persistent. Sunflowers are a great way to remediate the soil, although you may need multiple years of planting and disposal.