How to Prevent and Control Fungi in Your Greenhouse

How to Prevent and Control Fungi in Your Greenhouse

Fungi can cause significant damage to plants in your greenhouse, resulting in reduced yields and even death to some species. It is important to take steps to prevent and control the growth of fungi in order to ensure a successful crop yield. This blog will provide an overview of the different types of greenhouses, common fungi types, preventative measures, metal greenhouses, and treatments available for controlling existing fungi growth. For instance, check out the fungal growth on this plant - in white. 

Mildew Fungal

What Causes Fungi to Grow in Your Greenhouse?

It is essential to maintain a healthy environment in your greenhouse in order to maximize crop yields. Fungi can quickly spread and cause significant damage to plants and reduce yields if left unchecked. Understanding the different types of greenhouses and the potential for fungi growth can help you take the necessary steps to prevent and control its growth.

Greenhouse from outside on a sunny day

Greenhouses can be made from a variety of materials, including plastic and metal. Plastic greenhouses are generally cheaper and easier to assemble but are not as durable or insulated as metal greenhouses. Metal greenhouses are more expensive but offer greater durability and insulation, making them better suited for extreme temperatures. Additionally, some greenhouses may be permanent structures while others may be temporary. It is important to consider the type of greenhouse you are using and its potential for fungi growth when taking preventative measures.


Common Fungi Types

Identifying the different types of fungi that may be present in your greenhouse is the first step in controlling it. Some of the most common types of fungi found in greenhouses include powdery mildew, black spot, and rust.

1. Powdery Mildew

Powdery mildew appears as a white or gray powdery substance on the surface of leaves and stems. It can spread quickly between plants, causing reduced crop yields, damage to plants, and can also spread spores to other areas.

powdery mildew fungal

2. Black Spot

Black spot is another common fungus that appears as black spots on leaves and stems. It is also highly contagious and can lead to defoliation, reduced fruit production, and death of some plants.

Black Spot fungal

3. Rust

Rust appears as orange or yellow spots on leaves, stems, and fruits and can cause significant damage if left untreated.

Tomato Fungal Rust


Fungi Preventive Measures

The best way to control fungi growth is by taking preventative measures before it has a chance to spread. You can practice these:

  1. Remove infected plants from your greenhouse is essential in preventing the spread of fungi to other plants. 
  2. Practice proper sanitation such as cleaning tools and surfaces regularly can also help reduce the risk of fungi growth.
  3. Avoid over-watering plants is also important as too much moisture can increase the risk of infection.
  4. Proper ventilation is an important factor in preventing fungi growth in your greenhouse. Utilizing fans to increase air circulation can help reduce humidity levels which limits the potential for fungi growth.
  5. Use shading materials such as a shade cloth can also help reduce humidity levels and improve air circulation which can limit the spread of spores. Furthermore, utilizing natural sunlight for plant growth can provide additional protection against fungi growth.


Choosing Metal Greenhouse

Using a metal greenhouse can be beneficial in reducing the growth of fungi due to its increased durability and strength, improved insulation, and resistance to extreme temperatures. Selecting a metal that is corrosion-resistant is essential as corrosion can weaken the structure over time and increase the potential for fungi growth.

Additionally, proper installation and insulation are also important for limiting fungi growth; such as using double-paned windows for insulation which will help maintain ideal temperatures for plant growth while also limiting humidity levels. We provide smart metallic greenhouses. You can create your own greenhouse and check out the amount through our greenhouse price calculator. We are currently giving a 10% discount to all our products and services. 

Greenhouse Price calculator


Treating Fungi

If fungi has already taken root in your greenhouse then it is important to treat it immediately. There are a variety of treatments available for controlling existing fungi growth; including chemical treatments, biological controls, and natural remedies such as baking soda or vinegar solutions.


It is important to research each treatment option thoroughly before selecting one in order to ensure it is safe for your particular species of plant and that you follow all label instructions properly. Additionally, proper timing, application, and dosage are all important factors when treating existing fungi; allowing enough time between treatments and avoiding overdosing plants with chemicals or natural remedies will help ensure successful results.

Point to Note 

Controlling the growth of fungi in your greenhouse is essential for ensuring successful crop yields. Understanding the different types of greenhouses and common fungi types can help you take the necessary steps to prevent its growth; such as removing infected plants from your greenhouse, practicing proper sanitation, avoiding over-watering plants, utilizing proper ventilation, utilizing natural sunlight for plant growth, selecting corrosion-resistant metals for construction, and utilizing effective treatments when necessary. Following these steps will help ensure successful crop yields while minimizing the potential for damage caused by unchecked fungi growth.

Leave a Comment