Can Mold Grow On Plastic? How Fast It Grow & Ways to Clean

Mold is a fungus that grows in the form of multicellular filaments called hyphae. In general, mold thrives in warm and humid environments. So, the answer to the question posed in the title is “yes,” mold can grow on plastic if those conditions are present. However, it’s important to note that not all types of molds will grow on plastic surfaces. Some molds are more likely to grow on plastic than others, depending on the type of plastic and its surface finish. So, it’s important to be aware of what kind of plastics you’re working with and understand how to prevent mold growth if necessary.

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Can Mold Grow On Plastic?

Can Mold Grow On Plastic? Multiple Factors

While mold can technically grow on any surface, there are certain conditions that need to be met for it to thrive.


While mold spores are always present in the air, they only grow into mold when they land on a wet or moist surface. Plastic is a synthetic material that is water-resistant, so it’s not an ideal breeding ground for mold. However, if the plastic gets wet or there’s high humidity, mold can grow on the surface of the plastic. Similarly, if plastic is left in a damp area, such as a bathroom with a shower, the humid conditions can cause mold to grow. Some plastics are semi-porous, which means they can trap moisture and provide an ideal environment for mold to grow.

For this reason, it’s important to dry off plastic items after using them and to avoid storing them in damp areas. If you find mold growing on plastic, you can usually clean it off with soap and water. However, if the mold has been present for a long time, it may be difficult to remove. Sometimes, it’s best to discard the item and replace it with a new one.

Nutrient Source

While mold needs a nutrient source to spread and grow, it can start growing on many materials, including plastic. Cellulose is a primary food source for mold, and while plastic does not provide cellulose, it can act as a host for mold spores. The spores can start growing if there is dirt or soil on the plastic container. In addition, if there is residue from rotting food on the plastic, this can also provide a source of nutrients for mold growth. While mold may not be able to grow directly on plastic, it can spread quickly across the surface of the material if given the right conditions. As a result, it is important to clean plastic containers thoroughly to prevent mold growth.


Mold thrives in warm and humid environments, so it’s more likely to grow on plastic in these conditions. If plastic is stored in a hot and humid area, such as an attic or a garage, mold growth is increased. In addition, if plastic is exposed to direct sunlight, the heat can create favorable mold conditions. To prevent mold growth, it’s important to store plastic in a cool and dry place.

What Kills Mold On Plastic?

Mold and mildew can spread quickly on plastic surfaces, especially in humid environments. To kill mold on plastic:

  1. Start by cleaning the surface with warm water and dish soap.
  2. Disinfect the area with a vinegar solution or bleach. You may need to scrub the surface with a brush for stubborn mold.
  3. Once the mold is gone, dry the area completely to prevent new mold from growing. You can also prevent mold growth by storing plastic items in a dry, well-ventilated area.

By taking these steps, you can keep your plastic surfaces looking clean and fresh.

Should I Throw Away Moldy Tupperware?

Many people have had the experience of finding moldy Tupperware in their cupboards. While throwing the offending container away simply may be tempting, there are a few things to consider first. For one thing, mold can spread quickly, and even a small amount of mold can cause mildew to grow. In addition, once mold has started growing, it can be difficult to remove completely. As a result, it is often best to simply discard moldy Tupperware.

However, if the container is made of valuable material or if you want to try to salvage it, there are a few steps you can take:

  1. Scrub the moldy areas with soapy water and a stiff brush.
  2. Disinfect the container with a solution of bleach and water.
  3. Dry the container thoroughly before storing it again.

By taking these precautions, you can help prevent mold spread and keep your Tupperware in good condition.

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