What is Setting of Potato Skins?
As the potato matures, the skin ’sets’, that is, it thickens and becomes tough. The set skin protects the potato from damage and infection during storage.
How to test for Setting.
When the skins are mature (set), the skin will not scuff when rubbed in the hand, or gently scratched by the thumb. Skins of new potatoes will easily be removed by rubbing with a thumb, as they have not set.
How does the Potato Skin Set?
The green leaves and stalks of potatoes, known as the haulm, will start to die down at the end of the season. The potato tubers will then stop growing and the skins start to set. It usually takes three weeks for the skins to become set, but it is worth digging one tuber up and checking
the state of the skin, before lifting. The potatoes should not be harvested for storage until the skins have set.
Potatoes should be stored in a dark place in Hessian sacks, so that the air can circulate through them.
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