How To Store Potatoes Long Term The Right Way

Last Updated on October 22, 2026 by D. Ruddy

Properly storing potatoes keeps them fresh for months instead of days. If you’ve ever found sprouting or soft spuds in your pantry, learning how to store potatoes correctly will save you money and reduce food waste. The key lies in controlling light, temperature, and moisture—factors that most people overlook.

This guide covers everything from choosing the right variety to avoiding common storage mistakes that ruin your harvest.

Store potatoes in a cool, dark, and well-ventilated place at 45-50°F with 85-90% humidity. Avoid refrigeration, plastic bags, or sunlight to prevent sprouting, greening, or early spoilage.

Why Proper Potato Storage Matters

Potatoes are living organisms that continue to respire after harvest. Improper storage accelerates spoilage, leading to shriveled, sprouted, or rotten tubers. According to the University of Idaho, potatoes can lose up to 10% of their weight in moisture within just a few weeks if stored incorrectly.

This not only wastes food but also affects flavor and texture.

Storing potatoes the right way preserves their nutritional value, including vitamin C, potassium, and fiber. Poor storage can also cause the development of solanine, a toxic compound that turns potatoes green and gives them a bitter taste. This happens when potatoes are exposed to light, making proper darkness a non-negotiable factor.

• Prevents sprouting: Keeps potatoes dormant longer
• Stops greening: Blocks light exposure that causes toxicity
• Maintains texture: Preserves moisture for firm, fresh potatoes
• Extends shelf life: From 1-2 weeks to 2-3 months or more
• Retains nutrients: Prevents vitamin and mineral degradation

Warning: Never eat green or sprouted potatoes raw. The solanine content can cause nausea, vomiting, or worse. Cut away any green parts and sprouts before cooking.

Best Conditions for Storing Potatoes

The ideal storage environment for potatoes is cooler than room temperature but not as cold as a refrigerator. The sweet spot is between 45-50°F (7-10°C), which slows down the conversion of starch to sugar while preventing freezing. Humidity should be high—around 85-90%—to prevent the potatoes from drying out and becoming wrinkled.

Darkness is equally crucial. Even artificial light can trigger the production of solanine, the toxin that makes potatoes turn green. Ventilation is the third critical factor; without proper airflow, moisture can build up and lead to rot.

A well-ventilated container or storage area prevents this by allowing ethylene gas (produced naturally by potatoes) to escape.

Most modern kitchens lack these ideal conditions, which is why many people struggle with potato storage. Root cellars are perfect, but basements, garages, or even a cool closet can work if you control the environment properly.

Step by Step How to Store Potatoes at Home

Follow these steps to maximize the shelf life of your potatoes, whether you’ve grown them yourself or bought them in bulk from the store.

1. Select the right potatoes: Choose firm, unblemished potatoes without cuts, bruises, or sprouts. Small to medium-sized potatoes store better than large ones because they have less surface area relative to volume, reducing moisture loss.
2. Cure them first (for homegrown): If you’ve harvested potatoes from your garden, cure them for 1-2 weeks in a dark, well-ventilated area at 50-60°F. This toughens their skin, making them less prone to rot during storage.
3. Avoid washing: Never wash potatoes before storage. Moisture encourages rot, and removing the dirt also removes a natural protective layer. Brush off excess soil gently with your hands if needed.
4. Dry them thoroughly: If potatoes are damp (from rain or morning dew), spread them out in a single layer in a dry, dark place for a few hours to let them air-dry completely.
5. Choose the right container: Use breathable containers like burlap sacks, paper bags, cardboard boxes, or mesh bags. These allow airflow while keeping light out. Avoid plastic bags or airtight containers, which trap moisture and ethylene gas.
6. Layer them properly: If using a box or crate, layer potatoes no more than 4-6 inches deep. This prevents crushing and ensures good airflow around each tuber.
7. Store in the ideal location: Place the container in a cool, dark, and humid spot. A basement, root cellar, or even a bottom kitchen cabinet away from heat sources works well. Check the temperature and humidity regularly.

Tip: If you don’t have a cool storage area, consider using a second refrigerator set to 45-50°F. This mimics ideal root cellar conditions.

Best Containers for Potato Storage

The container you choose can make or break your potato storage efforts. The best containers share three traits: they block light, allow airflow, and prevent moisture buildup. Here are the top options, ranked by effectiveness.

Avoid plastic bags, glass jars, or any airtight container. These trap moisture and ethylene gas, leading to rapid spoilage. If you must use a plastic container, poke plenty of holes in it for ventilation and line it with a breathable material like paper towels.

How to Store Potatoes Without a Root Cellar

Not everyone has access to a root cellar, but that doesn’t mean you can’t store potatoes long-term. With a few adjustments, you can create suitable conditions in your home. The key is finding the coolest, darkest, and most humid spot available.

• Basement or crawl space: Often the coolest part of the house. Place potatoes on the floor (where it’s coolest) in a breathable container. Avoid areas near furnaces or water heaters.
• Garage (attached or detached): Works well in cooler climates, but temperatures can fluctuate. Insulate the storage container with blankets or straw to buffer temperature swings. Avoid garages where cars are parked, as exhaust fumes can affect potatoes.
• Unheated porch or mudroom: Ideal if the temperature stays consistently between 45-50°F. Ensure the area is dark and protected from freezing.
• Bottom kitchen cabinet: The coolest spot in many kitchens, especially if it’s away from the stove or refrigerator. Use a cardboard box lined with newspaper for extra insulation.
• Closet or pantry: Choose the coolest, darkest closet in your home, preferably on an exterior wall. Add a small humidifier or place a bowl of water nearby to increase humidity if needed.

Important: If storing potatoes in a garage or unheated space, check the temperature regularly. Potatoes can freeze at 32°F (0°C) or below, turning them mushy when thawed. If frost is a risk, bring them indoors or insulate the container.

For apartment dwellers or those in warm climates, consider a small dedicated refrigerator set to 45-50°F. Some people repurpose old refrigerators or wine coolers for this purpose. Alternatively, a cool closet with a fan for airflow and a humidifier can work in a pinch.

How Long Do Potatoes Last in Storage

The shelf life of potatoes depends on the variety, storage conditions, and initial quality. Under ideal conditions, most potatoes can last 2-3 months, but some varieties can keep for up to 6 months or more. Here’s a breakdown of what to expect:

New potatoes (harvested young) have a much shorter shelf life due to their thin skins and high moisture content. They’re best enjoyed fresh and shouldn’t be stored long-term. On the other hand, mature potatoes with thick skins, like Russets, store the longest.

According to the USDA, properly stored potatoes can retain most of their nutritional value for up to 3 months. After that, vitamin C content begins to decline, though the potatoes remain safe to eat if they show no signs of spoilage.

Signs Your Potatoes Have Gone Bad

Even with the best storage practices, potatoes can spoil. Knowing the signs of bad potatoes helps you avoid wasting food or risking illness. Here’s what to look for:

• Sprouting: Small sprouts or “eyes” appearing on the surface. While sprouted potatoes are still safe to eat if the sprouts are small, the tuber itself will be starchy and less flavorful. Remove the sprouts before cooking.
• Wrinkled or shriveled skin: A sign of moisture loss. These potatoes are still edible but may be dry and mealy. They’re best used in soups or mashed potatoes where texture is less important.
• Soft or mushy texture: Indicates rot or bacterial infection. Soft spots may start small but spread quickly. Discard any potato with a mushy texture.
• Green skin or patches: Caused by exposure to light, which triggers solanine production. While small green spots can be cut away, extensively green potatoes should be discarded.
• Mold: Fuzzy white, black, or green growth on the skin. Mold can spread to other potatoes, so remove the affected tuber immediately and check nearby potatoes.
• Bad smell: A musty or rotten odor is a clear sign of spoilage. Potatoes should have a mild, earthy smell. Any strong or unpleasant odor means they should be thrown out.
• Black or dark spots: Could be bruising or the start of rot. Small dark spots can be cut away, but if the flesh beneath is discolored or soft, discard the potato.

Warning: If a potato has a strong, unpleasant odor or is slimy to the touch, do not eat it. These are signs of bacterial infection, which can cause foodborne illness.

Regularly check your stored potatoes—about once a week—and remove any that show signs of spoilage. This prevents the spread of rot or mold to the rest of your supply. Remember the old saying: “One bad apple spoils the bunch.” The same applies to potatoes.

Common Mistakes to Avoid When Storing Potatoes

Many people unknowingly make mistakes that shorten the shelf life of their potatoes. Avoiding these common pitfalls can help you keep your spuds fresh for months.

1. Storing potatoes in the fridge: The cold temperatures in a refrigerator (usually around 40°F or 4°C) convert potato starches into sugars more quickly, giving them an unpleasantly sweet taste. This also increases the risk of acrylamide formation when cooked at high temperatures.
2. Keeping potatoes near onions: Both potatoes and onions release ethylene gas, which speeds up spoilage. Additionally, onions can absorb moisture from potatoes, causing them to dry out faster. Store them separately, ideally in different parts of the room.
3. Using plastic bags: Plastic traps moisture and ethylene gas, leading to rot. If you must use a plastic bag, poke plenty of holes in it for ventilation.
4. Exposing potatoes to light: Light triggers the production of solanine, the toxin that turns potatoes green. Even indirect light can cause this, so always store potatoes in complete darkness.
5. Storing unwashed garden potatoes immediately: Freshly harvested potatoes need to cure for 1-2 weeks before long-term storage. This allows their skins to toughen and minor injuries to heal, reducing the risk of rot.
6. Overcrowding storage containers: Potatoes need airflow to stay fresh. Piling them too deeply or packing them tightly can lead to moisture buildup and rot. Keep layers shallow (4-6 inches deep).
7. Ignoring temperature fluctuations: Consistent temperature is key. Fluctuations can cause potatoes to sprout or rot prematurely. Avoid storing them near heat sources or in areas with varying temperatures.

Another common mistake is storing potatoes with other fruits or vegetables. Many fruits, like apples and bananas, release ethylene gas, which can cause potatoes to sprout or spoil faster. Keep potatoes isolated from other produce for the best results.

Frequently Asked Questions

Can you store potatoes in the freezer?

Yes, but potatoes must be prepared first. Raw potatoes turn mushy when frozen due to their high water content. To freeze potatoes, first cook them (boil, bake, or parboil), let them cool, then spread them on a baking sheet to freeze individually before transferring to a freezer bag.

This method works well for mashed potatoes, fries, or hash browns. Frozen potatoes will last 10-12 months in the freezer.

Why do my potatoes sprout so quickly?

Potatoes sprout quickly when exposed to light, warmth, or ethylene gas. Even small amounts of light can trigger sprouting, as can temperatures above 50°F. Ethylene gas from nearby fruits or vegetables (like apples, bananas, or onions) can also accelerate sprouting.

To prevent this, store potatoes in complete darkness, at the right temperature, and away from other produce.

Is it safe to eat potatoes that have sprouted?

Yes, it is generally safe to eat sprouted potatoes as long as they are still firm and show no other signs of spoilage. The sprouts themselves can be toxic in large quantities, so remove them before cooking. If the potato is soft, wrinkled, or has a bad smell, it’s best to discard it.

Sprouted potatoes may taste bitter due to increased solanine levels, so taste a small amount first.

How do you know if a potato is bad inside?

Cut the potato open and check the flesh. A good potato will have firm, white or slightly yellow flesh. If the inside is soft, discolored (dark brown, black, or green), or has a foul odor, the potato has gone bad and should not be eaten.

Small dark spots can be cut away, but if the discoloration is widespread or the flesh is mushy, discard it.

Can you store potatoes with carrots?

It’s not ideal. Carrots, like onions, release ethylene gas, which can cause potatoes to sprout or spoil faster. Additionally, carrots prefer slightly different storage conditions (higher humidity and slightly cooler temperatures).

For best results, store potatoes and carrots separately. If space is limited, use separate containers or bags within the same storage area.

Final Thoughts

Mastering how to store potatoes properly extends their freshness from weeks to months while preserving flavor and nutrients. The key is controlling light, temperature, and humidity while using breathable containers. Avoid common mistakes like refrigeration or plastic bags, and regularly check for spoilage signs.

With these practices, you can enjoy fresh potatoes long after harvest and reduce food waste significantly.