After the greenery has died back, potatoes can stay in the ground for several days, if the conditions are right. As long as the soil is dry, and the temperature is above freezing, you don't have to harvest potatoes immediately. But it is best to dig them up within a few days to prevent rotting.
Can you leave potatoes in the ground to grow next year?
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.
Can I leave my potatoes in the ground over winter?
In moderate or cold climates, potatoes can stay in the ground until the soil freezes in late fall or early winter. Some folks have success heavily mulching (with mulch like straw, wood chips, or shredded leaves) the patch to keep the soil from freezing and dig potatoes all winter long.
Can I leave potatoes in the ground after the plant dies?
Mature potatoes are ready to dig just a few weeks after the plants have completely died. At first, just the lower leaves will yellow, but soon enough the entire plant will turn brown and flop to the ground. After this happens, wait two more weeks before digging up the tubers.
How do I save my potatoes for planting next year?
Harvest potatoes that you wish to use next year as seed potatoes and brush off, don't wash, any dirt. Place them in a cool, dry are of around 50 F. (10 C.). Three to four weeks prior to planting, put the potatoes in an area with brighter light, such as a sunny window or beneath grow lights.
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