When you decide it is no longer worth eating. That's probably when it has turned yellow or slimy or has black spots.
Where do you live?
No, broccoli should not cause a rash, unless you have an allergy to broccoli or to chemicals that may have been used in growing the broccoli.
YES.
Place broccoli in a sealed container, removing as much of the air from the container as possible. Store in the refrigerator where it will keep for 10 days. Do not wash broccoli before storing, because exposure to water encourages spoilage. Partial heads of broccoli should be placed in a well-sealed container and refrigerated. Because the vitamin C content starts to quickly degrade once broccoli has been cut, it is best to use it within a couple of days. Broccoli that has been blanched and then frozen can keep for up to a year. Leftover cooked broccoli should be placed in tightly covered container and stored in the refrigerator where it will keep for a few days.
Eggs should be thrown in the garbage when they crack open on the ground completely or when they start to rot
carrots dried broccoli and lettuces
thrown away.........
Broccoli and kiwifruit are considered high potassium food choices and should be limited by people on dialysis and those with a dietary potassium restriction.
No they won't kill you unless they have diseases on them.
Chemicals
If it reaches 50 deg C, then every thing in the fridge as well as the fridge itself should be thrown.
broccoli