Asparagus has low levels of potassium. Nutritionists recommend it to people trying to reduce their potassium intake. Asparagus does contain levels of potassium so portions need to be controlled.
Asparagus is a very good source of potassium. It has 288mg per cup in its raw form. If you need to reduce the potassium amount, boil it in unsalted water and throw away the water.