How to prevent mold in Hydroponic system


Mold is the worst enemy is hydroponic systems. If no measures are taken, mold can drastically interfere with the growth and yield of your plants. In most cases, many growers don’t know how to prevent mold in hydroponic system. But how can you stop mold from rearing its ugly head in your hydroponic gardens? These tips will go a long way in ensuring a mold-free hydroponic system.

#1. Properly seal your grow room

Properly sealed grow room will prevent microorganism from getting into your system. This can be more expensive, but will block mold from attacking your plants.

#2. Use certified clones

Buying clones from a reputable source is the best way to prevent mold in your hydroponic systems. Usually, the commercial clones are thoroughly inspected for potential mold. Moreover, such clones are less likely to have big flowers- a favorite spot for mold.

#3. Adjust the humidity

Mold thrives and multiplies very fast in high humidity. In this case, the humidity of your hydroponic grow room should lie between 43 to 52 percent. This will create unfavorable conditions for mold to grow. You can adjust the humidity using a dehumidifier or an air conditioner.

#4. Avoid too much watering

Over-watering the plants during bloom phase can cause much transpiration, which creates favorable conditions for the mold to thrive.

#5. Don’t supply too much nitrogen to the plants 

As suggested by some studies, applying too much nitrogen to the plants during the bloom phase can lead to mold development. In this case, you should be careful when supplying nutrients to your hydroponic plants.

#6. Observe the hygiene

Molds are very contagious and can quickly spread through clothing. Therefore, it is important to wear special clothing before entering your grow room. Moreover, visitors in your grow room may lead to the spread of mold to your hydroponic systems. You should provide your visitors with clean overalls and gumboots before entering your grow room.

#7. Remove the affected parts

Take action immediately you spot any signs of mold in your hydroponic grow room. Cut the entire branches and leaves of the affected plants and put them in plastic bags and dispose of them immediately. However, it is important to sterilize all the equipment that touches the affected plants. Observe the plants for several days to see if the mold would return. The most important thing is to prevent the affected plants from coming in contact with the healthy ones.

#8. Introduce beneficial life forms into the hydroponic system

Beneficial life forms can eradicate unwanted microorganisms on your hydroponic system. In this case, you should introduce beneficial fungi into your system. These fungi will consume microorganisms that can potentially cause mold in your grow room.


Mold can cause devastation within very short and leave growers counting the losses. Therefore, it is better to prevent the mold in your hydroponic system before it enters into the grow room. Fortunately, these preventative measures are easier to implement, and you don’t need to dig deep into your pocket. If your grow room is properly sealed, the chances of mold getting into your plants are almost zero. Having known and implemented these preventative measures, you will be sure of the abundant harvest.

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