Sweet vs. Regular vs. Colourful Potatoes – Which Is Best?

Regular potatoes (Solanum tuberosum) and red/blue-fleshed heritage potatoes are all the same species – just different varieties within the potato family. They belong to the nightshade family (Solanaceae), which also includes tomatoes, aubergines, and peppers.

Sweet potatoes (Ipomoea batatas), on the other hand, are completely different. They’re not part of the nightshade family at all but belong to the morning glory family (Convolvulaceae). Despite the name, they’re only distantly related to regular potatoes – which explains why their nutrition profile and growing conditions are quite different.

👉 In short:

• Regular, red, and blue-fleshed potatoes = same species, nightshade family.

• Sweet potatoes = different species, morning glory family.

• So next time you cook with them, remember: they may look alike, but they come from very different plant families!

How do they compare when it comes to nutrition?

Potatoes come in many forms – from the familiar fluffy white or golden varieties, to sweet potatoes, to striking red and blue-fleshed heritage types. 

Regular potatoes are a staple in UK kitchens – naturally fat-free, affordable, and full of vitamin C and potassium. Sweet potatoes, often praised for their beta-carotene, are nutritious too, but usually imported, meaning higher food miles. Meanwhile, colourful heritage potatoes add a burst of antioxidants and can turn everyday recipes into vibrant, healthy dishes.

Regular Potatoes

• Naturally fat-free, low in calories, and full of fibre (especially with the skin on).
• A great source of vitamin C, potassium, and B vitamins.
• Their slow-release starch makes them a satisfying energy food.

Sweet Potatoes

• Rich in beta-carotene (which gives them their orange colour), converted into vitamin A in the body – important for vision and immunity.
• Slightly higher in sugar but still full of fibre, vitamin C, and potassium.
• Popular for “health halo” status, but nutritionally closer to regular potatoes than most people think.

Red and Blue-Fleshed Potatoes

• Packed with antioxidants called anthocyanins – the same compounds found in blueberries.
• Just as versatile as white potatoes but with an extra nutritional boost.
• Fun to cook with: think purple mash or vibrant potato salads.

Food Miles Matter

While sweet potatoes are nutritious, they are often imported into the UK from the US, Egypt, or South Africa. Those long journeys mean higher food miles and a bigger carbon footprint. In contrast, regular and colourful heritage potatoes are grown right here in the UK. Choosing local, seasonal, and sustainable potatoes means supporting British farmers, reducing food miles, and enjoying versatile, healthy recipes. In short: for nutrition, flavour, and sustainability, heritage and colourful British potatoes are hard to beat.  Sticking with UK-grown potatoes is kinder to the planet and your plate.

✨ Top Tip:

Can’t decide between sweet potatoes and regular potatoes? Try mixing them together in a creamy mash. The sweet potato adds a natural hint of sweetness and extra vitamin A, while the regular potato keeps the mash fluffy and smooth. It’s the best of both worlds – tasty, colourful, and full of nutrients.