Even though both the potato and sweet potato originated from central and South America they are not related.

Sweet potatoes are from the morning glory family, Convolvulaceae, and white potatoes are nightshades, or Solanaceae.

Sweet potatoes which we eat are the root of the plant and are root tubers.

Potatoes are stem tubers and consist of the thickened portions of underground stems called stolons.

Confusingly, sweet potatoes are root vegetables and potatoes which are often thought of as roots are technically tubers.

Both sweet and regular potatoes grow under the soil but they are very different when it comes to density, taste and nutrition.

While white potatoes are higher in potassium, sweet potatoes provide much more vitamin A.

Today’s variety - Red Duke of York (1st Early)

Introduced in The Netherlands in 1942

Oval tubers with a deep red skin, spectacular foliage with ‘blue’ centres’.

A good all rounder and excellent for roasting.

About my January Potato Journey

I am trying to build up my horticulture knowledge, all views are my own and are intended to be in a positive spirit.

I am a member of Nottingham Organic Gardeners (NOGs)

The daily posts are hoped to feature varieties which are likely to be part of Nottingham Organic Gardeners’ Potato Day and some fun potato trivia.

Also to be my celebration of the potato and Nottingham Organic Gardeners Potato Day.

More information at

The online potato day shop will be opening on Saturday 30th January 2021 at 10am!

Day 21: Sweet potato vs potato