Make sure you know the difference between an edible chestnut and a horse chestnut. The edible American chestnut was wiped out by chestnut blight. The latter are mildly poisonous but also very commonly found as ornamental trees.

I remember seeing a handful of chestnut saplings bred to be blight resistant that weren’t bearing nuts yet. I doubt you’ll find a farm or any other place to pick them.

Imported edible chestnuts show up in stores in November. Packaged shelled chestnuts are usually from China. Fresh raw chestnuts are from Europe, I think.