Most vegetables with under 150 mg of potassium per serving qualify as low-potassium choices. That includes many everyday staples like cucumbers, green beans, cabbage, and lettuce. If you’ve been told to watch your potassium intake, typically because of kidney concerns, you still have a wide range of vegetables to work with.
People on a potassium-restricted diet generally aim for 2,000 to 2,500 mg of potassium per day. Knowing which vegetables fall on the lower end helps you plan meals without constantly second-guessing your plate.
Vegetables Under 100 mg Per Serving
These are the safest picks if you’re keeping potassium as low as possible. All values are for a half-cup cooked or raw serving (about 75 grams) unless noted otherwise.
- Alfalfa sprouts: 13 mg per half cup
- Bamboo shoots (canned): 53 mg per half cup
- Watercress: 56 mg per half cup
- Lettuce (all varieties): 80 mg per 1 cup
- Cucumber (peeled): 81 mg per half cup
- Water chestnuts (canned): 82 mg per half cup
- Chinese cabbage (raw): 83 mg per half cup
- Green beans or wax beans: 85 mg per half cup
- Cabbage (raw): 86 mg per half cup
- Green bell pepper: 89 mg per half cup
Cucumber and lettuce are especially useful as base ingredients for salads, letting you build a full meal while keeping potassium low. Canned bamboo shoots and water chestnuts lose potassium during processing, which is why their numbers are lower than fresh versions.
Vegetables Between 100 and 200 mg Per Serving
These are still considered low to moderate and fit comfortably into a potassium-restricted diet. You just want to be more mindful of how many of these you stack in one meal.
- Celery (raw): 104 mg per stalk
- Asparagus: 134 mg per 4 spears
- Cabbage (cooked): 154 mg per half cup
- Broccoli (raw): 166 mg per half cup
- Corn: 192 mg per ear
Notice that cooking cabbage bumps it from 86 mg to 154 mg per serving. That’s not because cooking adds potassium. It’s because cooked cabbage shrinks, so a half cup of cooked cabbage contains more actual cabbage than a half cup of raw. This pattern holds for most vegetables, so raw servings often look lower on paper.
The National Kidney Foundation also lists cauliflower, eggplant, kale, onions, white mushrooms, and green peas as low-potassium vegetables at standard half-cup servings. These are all solid options for adding variety to your meals.
Vegetables to Limit or Avoid
Some vegetables pack three to ten times the potassium of the options above. The biggest ones to watch out for:
- Potatoes (baked, with skin): 1,644 mg per large potato
- Sweet potatoes (baked): 542 mg per medium
- Spinach (canned): 538 mg per cup
- Beets (raw): 442 mg per cup
- Carrots (raw): 410 mg per cup
- Brussels sprouts: 342 mg per cup
- Winter squash (butternut, acorn, hubbard): 580 to 730 mg per cup
A single large baked potato can use up nearly your entire daily potassium budget on its own. Winter squash varieties are similarly concentrated. Spinach, beet greens, and other dark leafy greens that get praised for their nutrient density are high in potassium for the same reason: they’re packed with minerals.
Carrots are worth a special note. A full cup of raw carrots hits 410 mg, but a half-cup cooked serving (the amount the National Kidney Foundation lists as low-potassium) comes in significantly lower. Serving size matters more than you might expect.
How Cooking and Soaking Reduce Potassium
Potassium is water-soluble, which means it leaches out of food and into cooking water. You can use this to your advantage with a technique sometimes called “leaching.” Peel and dice the vegetable, soak it in warm water for at least two hours, then drain and boil it in fresh water. Discard the cooking water.
Research on this method shows that green leafy vegetables lose 40 to 49% of their potassium through soaking and boiling. Non-leafy vegetables like carrots or squash lose 30 to 39%. Tubers like potatoes see more modest reductions of 10 to 20%, partly because their denser structure slows the leaching process.
This means a vegetable that would normally be too high in potassium can sometimes become workable. Boiling broccoli from frozen, for example, reduces its potassium enough that the National Kidney Foundation includes it on their low-potassium list. The tradeoff is that you also lose some other water-soluble nutrients, like vitamin C, in the process.
Tips for Keeping Your Total Low
Staying within a potassium target is less about memorizing numbers for every food and more about building habits that work across meals. A few practical strategies help.
Stick to standard serving sizes. Many vegetables only qualify as low-potassium at a half-cup serving. Doubling or tripling your portion doubles or triples the potassium. This sounds obvious, but it’s easy to underestimate how much you’re actually eating, especially with salads or stir-fries where vegetables pile up.
Choose canned over fresh for certain vegetables. Canning leaches potassium into the liquid, so draining and rinsing canned vegetables can lower their potassium content. Canned bamboo shoots have 53 mg per half cup, while raw bamboo shoots contain over 800 mg per cup. That’s a massive difference.
Balance higher-potassium vegetables with very low ones. If you want broccoli at 166 mg in your stir-fry, pair it with green beans at 85 mg and green peppers at 89 mg rather than adding corn and asparagus on top. Spreading your potassium budget across the day gives you more flexibility at each meal.
Raw salad vegetables tend to be your most reliable low-potassium options. A salad built on lettuce, cucumber, green pepper, and raw cabbage can come in under 250 mg total while still filling a full plate.