Split pea soup is generally considered moderate to high in potassium and phosphorus. While peas can be part of a kidney-friendly diet in moderation, you should:

Watch portion sizes - stick to small servings
Consider reduced-sodium versions or make homemade to control salt
Ask your dietitian about specific amounts that fit your restrictions
Balance it with lower potassium foods at other meals
Remember to always check with your healthcare team about specific portion sizes and frequency that's right for your individual situation, as recommendations vary based on your lab values and stage of kidney disease.