3 Answers

oranges, bananas, potatos.

http://www.livestrong.com/article/239814-foods-with-high-amounts-of-potassium-citrate-iron/

According to the University of Rochester Medical Center, certain fruits, vegetables, beans, and enriched breads and cereals contain a lot of potassium citrate. Unlike for iron, meats are a poor source of potassium. The fruits with the most potassium include oranges, apricots, cantaloupe, prunes, bananas, grapefruits, tomatoes, avocados, peaches and raisins. Good vegetables to eat for potassium include potatoes, winter squash, beet greens, chard, peas, spinach and lima beans. Pinto beans, kidney beans, lentils and black beans also contain a lot of potassium. As with iron, cereals and breads may be enriched with potassium, so you will have to check product labels to learn how much potassium each product contains.
Read more: http://www.livestrong.com/article/239814-foods-with-high-amounts-of-potassium-citrate-iron/#ixzz27vKMNF7J

Bananas are rich in potassium and one of natures super foods. This is a great article that explains many of the benefits you can get from them, most of which come from the potassium http://ozhealthreviews.com/health-tips/9-benefits-of-eating-bananas/