Harvesting Potatoes

Potatoes can be harvested as tender new potatoes or allowed to mature fully for storage. The best harvest stage depends on intended use, variety, weather, and whether the tubers will be eaten immediately or cured and stored.

Decide Whether You Want New or Storage Potatoes

New potatoes are harvested before full maturity, while storage potatoes remain in the ground longer so skins can firm and tubers can develop better keeping quality.

Harvest New Potatoes Earlier

Once plants are well established and tubers have begun developing, small immature potatoes can be harvested for fresh eating.

Expect Thin Skins on New Potatoes

Immature potatoes have delicate skins that rub off easily and are generally better for immediate use than long storage.

Wait for Vine Decline for Storage Potatoes

As the crop matures, foliage naturally yellows, weakens, and dies back.

Check Skin Set

Rub a test tuber gently. Mature storage potatoes usually have skins that resist rubbing off easily.

Test More Than One Plant

Maturity can vary across the bed because of differences in soil moisture, fertility, and plant vigor.

Do Not Leave Mature Tubers in Wet Soil Too Long

Extended wet conditions can increase rot and disease risk.

Harvest Before Hard Freezing

Freezing temperatures can damage tubers near the soil surface and reduce storage quality.

Choose Dry Harvest Conditions When Possible

Moderately dry soil falls away from tubers more easily and reduces surface moisture during handling.

Use a Garden Fork Carefully

Insert the fork far enough from the plant to avoid spearing tubers, then lift the soil gradually.

Dig Beyond the Main Stem

Potatoes can form farther from the stem than expected, especially in loose soil.

Search the Soil Thoroughly

Small tubers can remain hidden after the main cluster has been removed.

Handle Tubers Gently

Fresh potatoes bruise easily even when skin damage is not obvious.

Do Not Throw Potatoes Into Containers

Dropping tubers onto hard surfaces can cause internal bruising and shorten storage life.

Separate Cut or Speared Tubers

Use damaged potatoes first rather than placing them with sound storage potatoes.

Keep Harvested Potatoes Out of Light

Light exposure causes greening and can increase naturally occurring glycoalkaloids.

Move Potatoes Into Shade

Do not leave harvested tubers spread in direct sunlight for extended periods.

Brush Off Loose Soil

Remove dry soil gently rather than scrubbing or scraping the skin.

Avoid Washing Storage Potatoes Immediately

Washing adds moisture and can interfere with curing and storage if tubers are not dried carefully afterward.

Sort by Condition

Keep healthy uninjured tubers separate from cracked, cut, diseased, or heavily bruised potatoes.

Inspect for Soft Rot

Soft, wet, leaking, or foul-smelling tubers should not enter storage.

Inspect for Insect Damage

Wireworms, grubs, and other soil pests can create holes or channels that shorten storage life.

Cure Mature Storage Potatoes

A curing period allows minor abrasions and skin injuries to heal before long-term storage.

Keep Curing Potatoes Dark

Darkness remains important during curing to prevent greening.

Store Potatoes Cool and Dark

Warm storage encourages sprouting and moisture loss, while light causes greening.

Provide Ventilation

Airflow helps limit condensation and localized heat buildup around stored tubers.

Inspect Stored Potatoes Regularly

Remove soft, leaking, moldy, or badly sprouted potatoes before deterioration spreads.

Record Variety Performance

Some cultivars produce better new potatoes while others have superior storage life or disease resistance.

Harvest Mature Tubers in Batches if Needed

Not every plant in a potato row reaches full maturity at exactly the same time. If some vines have finished while others remain active, harvest mature sections first rather than disturbing the entire bed.

Check Storage Potatoes for Hidden Bruising

Freshly dug tubers may look sound even after rough handling. Treat storage potatoes gently during sorting because internal bruising can appear later as dark damaged tissue.

Practical Takeaway

Harvest potatoes according to their intended use. Dig new potatoes carefully for immediate eating, allow storage potatoes to mature fully, protect all tubers from light and injury, and separate damaged potatoes before curing or storage.