The Dangers of Mold on Potatoes: What You Need to Know

February 25, 2023
Last updated on February 04, 2023
The Dangers of Mold on Potatoes: What You Need to Know

Potatoes are a common food item in many homes and are used in a wide range of dishes. If not stored correctly, however, mold can easily develop on them, causing both health and quality problems. This article provides information on what causes mold to grow on potatoes, how to recognize it, and how to avoid and control its growth.

Mold on Potatoes

Mold, a type of fungus, can grow on various surfaces, including food items. Its presence on potatoes can pose significant threats to both food quality and human health, making it important to detect it promptly and take measures to stop its growth.

Causes of mold growth on potatoes

Mold growth on potatoes can be caused by a variety of factors, including:

  • Improper storage conditions: Potatoes should be stored in a cool and dark environment. If they are exposed to light or heat, mold can grow more quickly.
  • Exposure to moisture: Potatoes are susceptible to mold growth if they are stored in a damp environment or are exposed to moisture.
  • Poor air circulation: Potatoes should be stored in an airtight container to prevent mold growth.
  • Presence of other mold sources: If other mold sources are present in the storage area, they can spread to the potatoes.

Signs of mold on potatoes

There are several signs to look out for when identifying mold on potatoes, including:

  • Visual appearance: Mold on potatoes can appear as a white or greenish film on the surface.
  • Smell: Potatoes with mold will emit a musty or moldy odor.
  • Soft or slimy texture: Potatoes that are affected by mold will have a soft or slimy texture.

Effects of mold on potatoes

Mold growth on potatoes can have several negative effects, including:

  • Health risks: Consuming moldy potatoes can cause serious health problems, including digestive issues and respiratory problems.
  • Quality degradation: Mold can cause the potatoes to deteriorate in quality, making them unsuitable for consumption.
  • Possibility of spreading to other foods: Mold can easily spread from one food to another, so it is important to take precautions to prevent its growth.

Consuming Slightly Soft or Sprouted Potatoes

Potatoes that are just a little soft or have a few sprouts can still be safe to consume if the flesh is not damaged and the potatoes do not have any signs of mold growth.

However, it is best to cut away any soft or sprouted areas before cooking, as they may have a slightly different texture and flavor than the rest of the potato.

How to properly store potatoes to prevent mold

The following tips can help you properly store potatoes to prevent mold growth:

1. Cool and dark environment

It is not recommended to store potatoes in the refrigerator. Potatoes are best stored in a cool, dark place with proper ventilation, such as a pantry or basement. The cold temperature of a refrigerator can cause the potatoes to develop a sweet, bitter taste and become more difficult to cook.

This is because the low temperature triggers the conversion of starch into sugar, which affects the taste and texture of the potatoes. Additionally, the humidity level in a refrigerator can lead to moisture buildup, promoting the growth of mold and bacteria on the potatoes.

2. Proper ventilation

The storage area should be well-ventilated to prevent mold growth. Proper ventilation helps to regulate temperature and humidity levels, which are the two primary factors that contribute to mold growth on potatoes.

High humidity levels can cause moisture to accumulate on the potatoes, providing a perfect environment for mold to grow. By controlling temperature and humidity levels, you can ensure that your potatoes are stored in the best possible conditions, and remain fresh and mold-free for a longer period of time.

3. Use of airtight containers

Potatoes should be stored in airtight containers to prevent exposure to moisture and to limit air circulation. Airtight containers help to prevent moisture from entering the storage area and coming into contact with the potatoes. This helps to keep the potatoes dry and reduces the risk of mold growth.

4. Avoiding exposure to moisture

Potatoes should be kept away from moisture sources to prevent mold growth. Potatoes are susceptible to mold growth when exposed to moisture, as mold thrives in damp environments. To prevent this, it is important to keep potatoes away from sources of moisture such as leaking pipes, damp walls, or areas that are prone to condensation.


Mold growth on potatoes is a serious issue that should not be ignored. By understanding the causes and taking the necessary precautions, you can prevent mold growth and keep your potatoes fresh and safe for consumption.

Proper storage conditions, regular monitoring, and discarding affected potatoes are key steps to preventing mold growth on potatoes. By following these tips and using fungicides if necessary, you can ensure that your potatoes remain mold-free and safe for consumption.

In summary, mold on potatoes is a common problem that can be prevented through proper storage practices and regular monitoring. By being aware of the causes and taking the necessary steps, you can keep your potatoes fresh, safe, and free of mold.

Profil Picture Iris Janine Freeman

Meet Iris Janine Freeman, a freelance copywriter and food blogger from the East Coast. When she's not busy crafting the perfect words for her clients, Iris can be found experimenting with new recipes in the kitchen or planning her next travel adventure.

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