This is how you select the best potatoes for different situations.
The color-coded potato bags indicate the degree of flouriness of the potatoes. The degree of flouriness matters, because certain dishes require a certain type of potato. You shouldn’t try to make mashed potatoes from the potatoes in the green bag or fish soup from the potatoes in the red bag.
The potatoes sold in the green bag are firm, the ones sold in the red are floury, and the ones sold in the yellow bag are multi-purpose general purpose potatoes.
The amount of starch in firm potatoes is small. Firm potatoes are well suited for cooking potatoes, salads and soups, where it is desirable to keep the size of the potato.
The amount of starch in floury potatoes, on the other hand, is high, which causes the structure of the potato to break down more easily. Floury potatoes are well suited for baked potatoes and mashed potatoes, for example.
The starch content of general potatoes is somewhere between solid and floury.
Growing conditions also affect potato varieties. That’s why there can be differences in the starch content of potatoes of the same variety depending on the year or place of growth.