How to check for mold in a greenhouse?

Checking the greenhouse for mold is an important measure that helps ensure the health of the plants and the general hygiene of the greenhouse. Mold can cause significant damage to plants and weaken their growth. This article discusses how to check for mold in a greenhouse and what steps can be taken to prevent and remove mold.

1. Visual inspection

The first step in checking for mold is to perform a thorough visual inspection. This means going over all parts of the greenhouse, including the plants, soil, walls, roof and other structures. Mold can appear in different forms, such as white, gray, green or black growth. In particular, you should pay attention to the following points:

• Plant leaves and stems: Check if there is mold growth or discoloration visible on the leaves or stems.
• Soil: Look for signs of mold on the surface of the soil or around the roots.
• Greenhouse structures: Check the walls, ceiling and other structures that may contain moisture and mold growth.

2. Measuring humidity

Moisture is one of the most important factors affecting mold growth. It is important to maintain the right humidity percentage in the greenhouse in order to prevent the growth of mold. A hygrometer can be used to measure the greenhouse’s air humidity and soil humidity. The recommended humidity in the greenhouse is usually 50-70%, depending on the plant species. If the humidity percentage is too high, it is important to take measures to reduce the humidity, such as improving ventilation.

3. Checking ventilation

Good ventilation is key to preventing mold. Check that there is sufficient ventilation in the greenhouse so that moisture does not accumulate. This can be achieved by opening windows and doors regularly or installing fans. Automatic ventilation systems can also be useful, especially in large greenhouses.

4. Distance between plants

The placement of plants in the greenhouse can affect the spread of mold. Make sure there is enough space between the plants to allow air to circulate freely. This helps reduce moisture build-up around the plants and prevents mold from spreading.

5. Regular cleaning

Regular cleaning of the greenhouse is important to prevent mold. Clean greenhouse structures, tools and other equipment regularly. Use disinfectants that are safe for plants and the environment. Cleaning the leaves and stems of plants can also help prevent mold growth.

6. Mold removal

If mold is found in the greenhouse, it is important to take measures to remove it. Small mold growths can be removed mechanically, for example by wiping them off with a damp cloth. For larger mold growths, it may be necessary to use mold removers. It is important to choose a product that is safe for plants and the environment. In addition, it is important to remove and dispose of all infected plants and soil to prevent the mold from spreading again.

7. Preventive measures

To prevent mold in the greenhouse, several preventive measures can be implemented:

• Make sure that the structures of the greenhouse are in good condition and that there are no leaks.
• Use good quality and well-drained soil.
• Avoid excessive watering and make sure the soil is allowed to dry between waterings.
• Use the distance between plants and ensure good ventilation.
• Regularly monitor the humidity level in the greenhouse and adjust if necessary.

Checking and preventing mold in the greenhouse requires regular attention and care. By following these guidelines, you can ensure that your greenhouse stays healthy and your plants can grow and flourish without problems caused by mold.

Sources:
Gardeners’ World: How to prevent mold in the greenhouse
Royal Horticultural Society: Greenhouse maintenance