How to Store Yams

Storing yams properly is crucial for maintaining their firmness and freshness, ensuring that these nutritious vegetables stand the test of time in your kitchen.

Yams, much like their close relatives sweet potatoes, require specific conditions to retain their quality after harvest.

To safeguard their natural sweetness and robust texture, it’s important to understand the ideal environment that prevents them from deteriorating.

Yams are neatly arranged in a cool, dark pantry. A wire basket holds smaller yams, while larger ones are stored in a wooden crate. Labels indicate the date of purchase to ensure they are used before spoiling

When you store yams, aim for a cool, dry, and well-ventilated space.

The optimal storage temperature for yams is between 55-60 degrees Fahrenheit (13-15 degrees Celsius).

This range is critical because temperatures lower than 55 degrees can cause the starches within the yams to convert to sugars, altering their taste and texture. Meanwhile, temperatures higher than 60 degrees may encourage sprouting and lead to moisture loss, resulting in a hard texture.

To further preserve their longevity, avoid washing the yams before storing them as excess moisture can promote decay.

Instead, store them in a dark place to prevent the development of solanine, which can make the yams bitter and is a sign of deterioration.

Selecting Yams for Storage

A person selecting yams from a pile, placing them in a storage container

When storing yams, the key to longevity is to start with high-quality, undamaged yams. Making the right choices early on prevents unnecessary waste and maintains the yams’ inherent sweet flavor.

Assessing Freshness and Quality

To ensure you’re selecting yams that will last, examine the skin for signs of freshness. Choose yams that have:

  • Firm texture: Gently squeeze to check for firmness. They should resist pressure and not be soft or mushy.
  • Smooth skin: Look for even-colored skins with minimal blemishes or wrinkles.
  • No signs of sprouting: Sprouts can indicate aging, suggesting a shorter shelf life.
  • Intact skin: Avoid yams with cuts or cracks, as these can lead to quicker spoilage.

Checking for a hard center is also vital. A yam with a hard center may not have fully matured, affecting its flavor and storage potential.

Understanding Varieties and Characteristics

Yams come in different varieties, each with its own characteristics. Here’s how you can differentiate and select accordingly:

  • Size and shape: Opt for medium-sized yams that are uniform in shape for consistent cooking and easier storage.
  • Skin color: While yam skin varies from pink to dark brown, select ones that are true to their variety’s typical color.
  • Sweet flavor: If possible, select a variety known for its sweet flavor if this is what you prefer; some yams are starchier and less sweet.

Pre-Storage Preparation

Yams being washed and dried, then placed in a cool, dark, and well-ventilated area for storage

Before storing your yams, two initial steps are crucial: proper cleaning to remove dirt and potential bacteria, and curing to enhance shelf-life. These preparations are key to maintaining freshness and preventing spoilage.

Cleaning and Curing Yams

Cleaning Yams:

  1. Rinse yams thoroughly under cool running water.
  2. Gently scrub the skin with a clean vegetable brush to remove excess dirt.
  3. For any stubborn dirt or stains, use a solution of water and lemon juice as a natural cleaner.
  4. Pat the yams dry with a paper towel or clean cloth.

Curing Yams:

  • Place the cleaned yams in a well-ventilated area with a temperature between 80-90°F (27-32°C) for about 7 to 10 days.
  • Ensure the space is humid, ideally around 85-90% humidity, to allow the skins to harden and any cuts to heal.

Pre-treatment to Prevent Spoilage

After curing, treat your yams to protect against mold and decay:

  1. Avoid washing yams with water if you are not curing them immediately to prevent moldy spots.
  2. Do not use any oils or greases, as these can create a conducive environment for mold growth.
  3. If you’ve cured the yams, ensure they are completely dry before storage, as moisture can lead to spoilage.

Ideal Storage Conditions

To maintain the quality and freshness of your yams, it’s crucial to provide the right temperature and humidity levels, alongside ensuring a well-ventilated storage area.

Temperature and Humidity Levels

The optimal temperature range for storing yams is 55°F (12°C) – 60°F (15°C).

It’s imperative to avoid temperatures that drop to freezing or rise to common room temperatures, as these extremes can damage the tubers.

You also need to maintain moderate humidity levels to prevent the yams from drying out or becoming too moist, which could promote mold growth.

Strive to keep humidity levels at around 75-80% for ideal conditions.

Creating a Ventilated Environment

Yams require an environment with adequate ventilation to prevent the accumulation of ethylene gas, which they naturally emit. This gas can accelerate decay if not dissipated.

Store your yams in a cool, dark place—a root cellar, basement, or a pantry away from direct light is suitable.

Utilize storage options like wooden crates or baskets lined with newspaper to encourage air flow around the vegetables.

It’s important that the storage location is not sealed tight; instead, it should allow air to circulate freely around the yams.

Storage Methods

Proper storage of yams is crucial to maintain their freshness and extend their shelf life. This section highlights methods to store yams using different containers and environments tailored to both short and long-term needs.

Using Baskets, Boxes, and Containers

For short-term storage, keep yams in a cool, dry place like a pantry.

Use baskets or wooden crates that allow air circulation, which is vital to prevent moisture accumulation and spoilage.

It is advised to line these containers with newspaper to absorb any excess moisture. Avoid using airtight containers for this storage method, as yams need ventilation.

Refrigerator and Freezer Options

  • Refrigerator: Store cut yams in plastic bags or containers in the fridge for up to 7 days. Ensure they are dry to prevent mold growth.
  • Freezer Storage: For longer preservation, blanch peeled yams, let them cool, and then freeze them.
  • Place the yams in vacuum-sealed bags or wrap them tightly in plastic wrap to protect from freezer burn.
  • Frozen yams can last for several months.

Long-Term Storage Techniques

For long-term storage without freezing, keep yams in a basket or container in a dark, well-ventilated area at temperatures between 55°F and 60°F.

If properly stored, yams can last up to a month or more.

For freezing, use the method described above to extend their shelf life to up to a year, ensuring that you have labeled the freezer storage bags with the date of storage.

Monitoring Yams During Storage

Yams in a cool, dark storage area. Regularly check for signs of spoilage or sprouting. Keep them dry and well-ventilated

To maximize your yams’ shelf life and quality, regular monitoring is crucial. This involves checking for spoilage signs and maintaining optimal conditions to prevent decay.

Checking for Signs of Spoilage

When monitoring yams during storage, be vigilant for any signs of spoilage. Look for the following indicators:

  • Mold and Rotting: Check for any fuzzy mold growth or soft, rotten spots, which indicate bacterial growth and decomposition.
  • Sprouting: If yams begin to sprout, they’re using up their stored nutrients, leading to a loss in quality.
  • Odor: A musty or sour smell can signal that the yams are deteriorating.
  • Color Changes: Keep an eye out for any discoloration on the skin or the flesh of the yam, as this could suggest spoilage.

Remember to inspect yams individually and remove any that show signs of spoilage to prevent it from spreading to healthy yams.

Maintaining Optimal Storage Conditions

Creating an environment conducive to prolonging the life of your yams involves managing several factors:

  • Temperature: Yams should be stored in a cool, dry place—ideally between 55°F to 60°F. Avoid temperature fluctuations that can lead to condensation.
  • Humidity: A moderate humidity level helps prevent yams from drying out or becoming too mushy. Strive for a humidity level of about 65-70%.
  • Ventilation: Ensure your storage area is well-ventilated to avoid condensation and accumulation of ethylene gas, which can cause yams to soften and rot.

Using Stored Yams

When you retrieve yams from storage, preparing them correctly for cooking is crucial to ensure the best flavor and texture.

Properly rehydrating and cooking stored yams will allow you to make the most of this versatile and nutritious root vegetable.

Preparation for Cooking

Before cooking your stored yams, it’s important to inspect them for any signs of spoilage such as soft spots or mold.

If they appear healthy, proceed by giving them a thorough wash to remove any dirt. You can prepare yams in various ways:

  • Boil: Peel the yams and cut them into chunks. Place the pieces into a pot of boiling water and cook until tender, which typically takes about 20 to 30 minutes.
  • Microwave: For a quicker option, you can microwave the yams. Pierce the skins several times with a fork, then microwave on high for about 5 to 8 minutes per yam, turning halfway through.
  • Oven: Baking yams in an oven can enhance their natural sweetness. Preheat your oven to 425°F (220°C), pierce the yams’ skins, and bake for about 45 minutes or until they’re soft.

Rehydrating and Cooking Stored Yams

If you’re working with dehydrated yams:

  1. Place them in a bowl of warm water until they’ve absorbed enough moisture to return to their original texture (usually a few hours).
  2. After rehydration, you may cook them as you would fresh yams, following the aforementioned methods.

For mashed sweet potatoes:

  • Mash the boiled or baked yams while they’re still warm. Mix in your desired amount of butter, milk, salt, and seasonings until you achieve a smooth, creamy consistency.

In terms of sweet potato storage, cooked sweet potatoes can last in the fridge for about a week or you can freeze them for longer-term storage. To freeze:

  • Let the cooked yams cool down completely.
  • Portion the yams into individual servings if desired, which makes it easier to reheat only what you need later.
  • Use airtight containers or freezer bags to prevent freezer burn.

When reheating leftovers, you can use the microwave, oven, or even stovetop to warm them up. Make sure to cover them to retain moisture and reheat to a temperature of 165°F (74°C) for food safety.

Health and Nutritional Information

A kitchen counter with a pile of fresh yams, a knife, and a cutting board. A printed sheet of health and nutritional information on yams is taped to the wall

Yams are a nutrient-dense food that provide an array of health benefits to your diet. They are an excellent source of vitamins, minerals, and antioxidants, which are essential for maintaining good health.

Vitamin CImmune support, skin health
Vitamin B6Brain health, energy
PotassiumBlood pressure regulation
ManganeseBone health, metabolism
FiberDigestive health

Rich in complex carbohydrates and dietary fiber, yams can help in regulating your blood sugar levels and providing a sustained energy release.

The fiber content also aids in your digestion, contributing to a healthier gut. Though yams contain starches and natural sugars, these are integral to their role as an energy source in your diet.

The antioxidants in yams, such as beta-carotene and vitamin C, are known to fight free radicals, potentially reducing your risk of chronic diseases. Consuming yams may leave you less susceptible to certain health conditions, given their rich nutrient profile.

While yams are generally safe to eat and not commonly associated with foodborne illnesses, it is important to handle and store them properly to prevent spoilage. Always ensure yams have a fresh scent and firm texture to determine their quality.

Tips for Reducing Waste

When handling yams, reducing waste is critical for both saving money and being environmentally conscious. It starts with maximizing their shelf life and extends to finding inventive ways to use any surplus or aging yams.

Maximizing Yams Shelf Life

Choosing Yams: Always select yams that are heavy for their size with unblemished skins and firm texture. Avoid any with signs of damage or decay as they spoil faster.

Storing Conditions:

  • Temperature: Keep yams in a cool, dry place with good ventilation, ideally around 55-60°F (12-15°C). Avoid refrigeration, which can alter their flavor and texture.
  • Environment: Store them in a crate or basket that permits airflow, or use a breathable bag.
  • Debris Removal: Clean yams by gently scrubbing off dirt before storing them to prevent any potential rotting.

Creative Uses for Excess or Aging Yams

Blanching and Freezing:

  1. Peel your yams.
  2. Cut them into chunks or slices.
  3. Blanch in boiling water for a few minutes.
  4. Transfer them to an ice bath immediately to halt cooking.
  5. Drain well, then bag in air-tight containers and freeze.


  • Sweet Potato Storage Techniques: Similar to yams, you can apply sweet potato storage techniques such as curing in a warm place to extend shelf life before moving to a cooler environment.
  • Cooking Aged Yams: Transform aging yams with bruising or soft spots by cooking them immediately. You can use them in stews, soups, or make mashed yams, where perfect appearance isn’t critical.
  • Grocery Store Use-By Tactics: Follow the grocery stores’ approach and consume older yams first. Keep newer purchases at the back of your storage area to ensure first-in, first-out usage.

Frequently Asked Questions

Proper storage of yams can significantly extend their freshness and flavor. Below you’ll find answers to common questions to help you preserve yams effectively.

What is the best way to store yams after they have been cut?

After cutting yams, immediately immerse them in water and refrigerate. This prevents oxidation, which can spoil the flavor and color. Use them within 24 hours.

Can yams be safely stored overnight without spoiling?

Yes, yams can be stored overnight without spoiling. Store them in a cool, dark place away from moisture; they can remain fresh until the next day.

What are the recommended methods for preserving yams during the winter season?

During the winter, keep yams in a well-ventilated area at a controlled temperature between 13-16°C (55-60°F). Avoid storing them near heat sources or in areas prone to frost.

Is refrigeration a safe method for storing yams, and if so, how should they be prepared?

Refrigeration is not typically recommended for raw yams as it can alter their texture. However, if refrigerating, ensure they are dry and stored in a perforated bag for up to one week.

Can yams be frozen for long-term storage, and what are the steps to do so effectively?

Yams can be frozen for long-term storage. First, blanch sliced yams, then cool them rapidly. Finally, pack them in airtight bags or containers and freeze. This method can keep yams fresh for several months.

What are the guidelines for storing cooked sweet potatoes to maintain their quality?

For cooked sweet potatoes, refrigerate them within two hours of cooking.

Store in airtight containers and use them within five days for the best quality and safety.

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Cassie brings decades of experience to the Kitchen Community. She is a noted chef and avid gardener. Her new book "Healthy Eating Through the Garden" will be released shortly. When not writing or speaking about food and gardens Cassie can be found puttering around farmer's markets and greenhouses looking for the next great idea.
Cassie Marshall
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