If you have been advised to control your potassium consumption when following a renal diet, avocados,  should be restricted or avoided.
 

 A number of leafy green vegetable species, including spinach, chard, and beet greens, may also need to be consumed in moderation due to their high potassium content.

Bananas have a high potassium level, much like avocados do. Bananas are low in salt, but it's still advisable to avoid eating them every day. 

Depending on how much you eat, potassium may be an issue. A cup of cooked tomatoes contains significantly more potassium than one or two slices of raw tomato.

On a renal diet, oranges and orange juice should probably be avoided or consumed in moderation due to their high potassium level. 
 

Due to its high potassium and phosphorus content, brown rice should probably be restricted or portioned carefully while following a renal diet.