However, the skin on the potato does harden and cure to make it stronger for storage. We recommend leaving the potatoes in the ground for about 2 weeks after the plants have died off.
How long can potatoes stay in the soil?
Many earlies and second earlies will easily keep in the ground for two weeks past their optimum harvest date. Their skins will tend to harden up and some of the "fresh from harvest" taste will be lost but it's better than simply throwing them away. When the foliage starts to die down harvest those potatoes you can eat.
What happens if potatoes are left in the ground?
Yes, you can actually grow potatoes from last year's crop. If you left some tubers in the ground over the winter after last year's harvest, however, don't use these as seed potatoes. If they do sprout, pull them up, as they will probably result in weak plants that produce small and inferior crops.
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