Harvesting and storing potatoes - a guide

By Blake Jackson

Potatoes are typically ready to harvest 85 to 140 days after planting, depending on the variety. The timing of harvest depends on the intended use of the potatoes.

Harvesting Potatoes

• New Potatoes: For immediate use, harvest new potatoes shortly after the plant blooms. These small, thin-skinned potatoes have a short shelf life.
• Storable Potatoes: For long-term storage, wait until the plant tops turn brown and die. This usually occurs in late August. Allow the potatoes to remain in the ground for two to three weeks after the tops die back to allow the skins to thicken and toughen.
• Weather Considerations: Avoid harvesting in wet conditions to prevent soilborne diseases and rot. If the weather is dry, potatoes can remain in the ground until a killing frost. However, harvesting before a hard frost is generally recommended to prevent freezing and subsequent rot.

Potato Digging Tips

• Digging Conditions: The ideal time to dig is when the soil is slightly moist. Avoid digging in dry soil.
• Tools: Use a digging fork, not a spade or shovel, to minimize damage to the potatoes.
• Digging Technique: Insert the fork at a 90-degree angle to the soil, 7-8 inches from the stalk. Dig carefully to avoid spearing or bruising the potatoes.
• Checking Readiness: Potatoes are ready to harvest when the skin is firmly attached to the flesh. If the skin is thin and easily rubs off, they need more time in the ground.

Storing Potatoes

• Preparation: Brush off loose soil and allow the potatoes to cool down and dry in a shaded area.
• Storage Conditions: Store potatoes in a dark, well-ventilated space with a temperature of 45 degrees Fahrenheit and 90-95% relative humidity. Avoid refrigerators as they can cause the potatoes to become sweeter and darker.
• Storage Containers: Use burlap bags, paper bags, cardboard boxes, or other well-ventilated containers that block light.
• Avoid Washing: Do not wash potatoes until you are ready to use them to prevent disease spread.

By following these guidelines, you can ensure a successful potato harvest and enjoy a bountiful supply throughout the winter.

Photo Credit: gettyimages-npantos