How To Avoid Root Rot In Hydroponics (Expert Advice)

While hydroponics is a great way to grow your plants, it can be difficult to keep them healthy if you don’t understand how to avoid root rot. With this guide, you’ll learn what causes root rot and how to prevent it. 

You’ll also learn about the best ways to treat root rot if you do find yourself having problems with your hydroponic plants.

Root Rot In Hydroponic – How To Save Your Plants

Sure, here is the single column takeaway table based on the title “Tips for Avoiding Root Rot in Hydroponics”:

Proper drainage can help prevent root rot in hydroponics.
Using sterile growing medium can prevent the buildup of harmful microorganisms.
Plants require proper oxygen levels to thrive in hydroponics.
Treating root rot early can increase the chance of successful recovery.
Monitoring nutrient levels can help prevent the conditions that lead to root rot.

Avoid Overwatering Your Plants

Overwatering is one of the most common mistakes that home gardeners make, and it can lead to root rot. 

If your plants are getting too much water, you may notice leaves wilting or turning yellow. If the problem persists for too long, the plant may eventually die.

To avoid overwatering your plants:

  • Water your plant at its base rather than on top of its leaves (this will help prevent splashing).
  • Check the moisture level in each pot before watering again; if any soil feels dry or crumbly when pressed between two fingers gently together, then add more water as needed!

Remember that a little bit goes a long way — if you’re unsure whether or not you’re overwatering them by accident, try cutting back on how often you water until there’s no longer any doubt!

Get Nutrient Levels Right

The first thing that you can do to avoid root rot is to get your nutrient levels right.

A good rule of thumb for a starting point is to use half the recommended dose of nutrients. This should be enough for most plants and may even be too much for some plants, depending on the brand and type of nutrient solution you’re using. If so, cut back by 10% or so until you find what works best for your grow space.

Want to know how to add nutrients to your hydroponic system? Check out our guide on how to add nutrients to hydroponic system to learn the basics and ensure your plants stay healthy and happy.

Control Your Ph Levels

When it comes to hydroponic gardens, the pH level of your water is important. The pH level measures how acidic or alkaline your water is. This can affect the growth of your plants, so it’s important to keep it at a good level for them. 

Most plants prefer between 5.5 and 6.5 as their ideal pH level range. You can measure this with a test kit that you can purchase at any local gardening store or online resource like Amazon (this one has great reviews!).

Change Bulb At Correct Time – 12/12 Light Cycle

As you probably know, plants need light to grow. They also need the right amount of darkness in order to produce their own food via photosynthesis. 

A 12/12 light cycle is one that has twelve hours of light and twelve hours of darkness every day. This kind of schedule keeps your plants from getting confused about whether or not it’s daytime or nighttime, which can lead them to get stressed out and potentially stop producing food for themselves.

When changing your bulb, it’s important that you do so at the correct time because changing it too early will cause shock on your plant’s system; however, if you wait too long then you could end up missing an entire day worth of growth and might even kill off some tender parts!

Fungus can be a major problem in hydroponics gardening, but there are ways to avoid it. Our guide on how to avoid fungus in hydroponics covers tips and tricks that will help you keep fungus at bay and ensure your plants thrive.

Use The Best Hydroponics System For Your Plants

Root rot is more likely to occur if you are growing plants in a system that is too big for them, or has too many nutrients and water. 

This can be done by using too much food and not enough air, or by using too few holes in the grow media. You should also make sure that roots are not restricted in any way because this will lead to root rot.

Keep Your Grow Room Clean And Tidy

You need to keep your grow room clean and tidy at all times.

This keeps your roots healthy, as it removes any dead leaves or other debris that may have fallen on the floor of your grow space. Debris can get caught in the filter system, which can lead to problems with root rot.

Keeping your grow room tidy will also help prevent mould and bacteria from forming on surfaces like shelves, walls and pipes. The last thing you want is an infestation of spores in your system!

You should also try to keep a dry environment around your plants while they’re growing; this will help prevent root rot as well as moulds and other diseases that thrive in humid environments

High PPM levels can be damaging to hydroponic plants, but lowering them is easier than you might think. Check out our guide on how to bring down PPM in hydroponics to learn about different options and choose the best method for your setup.

Use Quality Hydroponics Nutrients

  • Use quality hydroponics nutrients.
  • Use a nutrient that is specifically designed for hydroponics, rather than just an all-purpose plant food.
  • The right balance of nutrients and minerals need to be in the solution at the right concentration (i.e., not too much or too little).
  • Check the pH level before you add your solution to your reservoir—and then make sure it stays in this range while you are growing your plants!
  • Don’t overfeed your plants; they don’t need any more than what is recommended by the manufacturer on the label or on their website! If you do overfeed them, then they will likely develop root rot from having too much salt or magnesium build up around their roots.

Use Sterilized Tools To Work On Your Plants

It’s also important to keep your tools clean and sterile when working on your plants. A bleach solution is the best way to sterilize anything that comes into contact with the roots, so make sure you have a spray bottle on hand for this purpose.

The last thing you want to do is introduce bacteria or fungi into your hydroponic system through dirty hands or tools. 

Make sure you wash your hands thoroughly before touching any plant matter, and use a clean paper towel (or something else disposable) to wipe down any surfaces that may have picked up germs while being used in other applications. 

The best tool for working with plants is one that is not used for anything else and if possible, it should be brand new!

Building a hydroponic garden indoors can be a great way to grow fresh produce year-round. Our guide on how to build a hydroponic garden indoors covers the basics, from choosing a space to selecting a system and getting your seeds started.

Remove Damaged Plants Quickly To Stop Spread Of Infection

One of the best ways to avoid root rot is by promptly removing infected plants. This will not only stop the spread of infection, but it also gives you a chance to assess whether your entire crop is affected. 

If you find a single plant with root rot and remove it as soon as possible, your plant may still be saved. 

You can then prune any other roots that have been damaged or removed from the diseased part of your plant and replant them elsewhere within your hydroponic system for continued growth!

If we were talking about traditional soil-grown plants, this would be easy enough—just pull up any dead leaves or small roots around an infected area (but leave larger ones in place). In hydroponics systems with large amounts of water movement like flood tables or deep water culture (DWC), however—where there are no solid surfaces for roots to cling onto—this becomes much more challenging!

Keep An Eye On Your Water Temperature

Keep an eye on your water temperature. Temperature changes can cause root rot, but they also cause other problems in a hydroponic system. 

If you notice that the temperatures are going up or down, it’s time to take a look at your system and make sure everything is okay. 

Temperature changes are a sign that something may be wrong with either the light intensity or humidity levels, so keep an eye out for both of these factors when troubleshooting any issues.

Tower gardens can be a great way to grow a variety of plants in a small space. Want to learn how to build your own? Check out our step-by-step guide on building a hydroponic tower garden for all the details and tips you need to get started.

Manage Humidity Carefully

Keeping humidity levels high is important for healthy plant growth. Hydroponic growers should use a humidity tray to maintain high levels of moisture, as well as a fan to keep air circulating within the room. If necessary, you can also use a dehumidifier to maintain optimal humidity levels.

Humidity trays are inexpensive and easy to use just fill them with water and put them next to your plants. Make sure that your plants are not being exposed directly sunlight when using a humidity tray; they’ll need lots of light (and heat), but direct sunlight could cause too much evaporation.

Tips for Managing Humidity in Hydroponics

Importance of HumidityHumidity is crucial for healthy plant growth in hydroponics, as it helps to maintain adequate moisture levels.
Using a Humidity TrayA humidity tray can help to maintain high humidity levels in your hydroponic setup by adding moisture to the air.
Circulating Air with FansA fan can help to circulate air within the room, preventing stagnant air and excess moisture from building up.
Using a DehumidifierIn some cases, a dehumidifier might be necessary to maintain optimal humidity levels in your hydroponic setup.
Monitoring Humidity LevelsIt’s important to regularly monitor humidity levels in your hydroponic system, and adjust as needed to ensure your plants stay healthy and happy.

Improve Air Flow In Grow Room Or Tent

If you want to avoid root rot at all costs, improve your air flow in the grow room or tent. Use fans to move air around the plants and between them. Air circulation helps prevent mold and fungus from developing on your roots.

Tips for Improving Air Flow in Hydroponics

Importance of Air FlowAir flow is important in hydroponics to prevent mold and fungus from developing on your plants’ roots.
Using FansFans can help to move air around your hydroponic setup, increasing circulation and preventing stagnant air.
Positioning FansIt’s important to position fans strategically to ensure that air is circulating throughout your grow room or tent.
Using Carbon FiltersCarbon filters can help to keep the air in your hydroponic setup clean and free from contaminants.
Monitoring Air FlowRegularly monitoring air flow in your hydroponic setup can help you identify areas where circulation could be improved.


You can avoid root rot by maintaining your hydroponic system and checking your plants regularly.

Avoiding root rot in hydroponics has never been easier! You just need to keep an eye on the water level in your reservoir and make sure there is always enough oxygen for your roots to breathe. 

If you think that something might be wrong with your plants or notice any signs of root rot, then it’s time to start treating them right away!

Further Reading

Here are some additional resources on the topic of preventing and fixing root rot in hydroponics:

How to Fix Root Rot in Hydroponics: This comprehensive guide covers everything you need to know about identifying and treating root rot in hydroponic plants.

How to Prevent Root Rot in Hydroponic Plants: This article provides tips and tricks for preventing root rot in hydroponics systems, including proper nutrient levels and cleanliness practices.

Hydroponic Root Rot: How to Fix and Prevent It: This guide offers information on the causes and symptoms of root rot in hydroponic plants, as well as strategies for preventing and treating the condition.


What causes root rot in hydroponics?

Root rot in hydroponics is typically caused by overwatering, poor drainage, high humidity levels, or a build-up of organic matter in the growing medium.

How can I identify root rot in my hydroponic plants?

Signs of root rot in hydroponic plants include yellow or brown leaves, stunted growth, slow or halted development, and a foul smell emanating from the root system.

What are some ways to prevent root rot in hydroponics?

Preventative measures for root rot in hydroponics include using a properly-sized container with adequate drainage, maintaining proper nutrient and pH levels, and ensuring that the growing medium is sterile.

Can root rot in hydroponics be cured?

If caught early enough, root rot in hydroponic plants can be treated by trimming away affected roots and by improving environmental conditions such as drainage, airflow, and humidity.

What’s the best way to treat root rot in my hydroponic system?

The best course of action for treating root rot in hydroponic plants is to identify and address the underlying cause of the rot, such as overwatering, poor drainage, or high humidity levels. Additionally, trimming away affected roots and adding beneficial microorganisms to the system can help promote good root health.