Answer:
The five foods other than bananas that are good sources of potassium (>300 mg/serving) are as follows:
1) Avocados - They contain 487 mg potassium per 100 gm serve.
2) Sweet potatoes - They contain 541 mg potassium per 100 gm serve.
3) Spinach - They contain 540 mg potassium per 156 gm serve.
4) Watermelons -They contain 640 mg potassium per 572 gm serve.
5) White Beans - They contain 829 mg potassium per 179 gm serve.