There are two causes for root rot, but the main cause is poorly drained or overwatered soils. These soggy conditions prevent roots from absorbing all the oxygen they require to live. As the oxygen-starved roots die and decay, their rot can spread to healthier roots, even if the soggy conditions have been rectified.
Root rot has two main causes: lack of oxygen and fungal infection. 1. Lack of oxygen: If a plant has been overwatered, has poor drainage, or its soil is too densely packed, this can cause a lack of oxygen. In these cases, the roots are essentially drowning.
Once root rot is identified, you must determine if the plant can be saved. If the entire root system has already become mushy, it is too late to save the plant. However, if some healthy, white, firm roots exist, try to bring the plant back to good health by replanting in fresh soil with good drainage.
Hydrogen peroxide can help to control fungal growth and fungal infection, such as root rot, by preventing the growth of fungi. It can also help kill fungus and bacteria on plant roots.
We advise not to right away, but within the same week of repotting is fine. The Soil should be slightly, naturally moist, so water when the top few inches feel dry as per normal. If you have treated your plant, it shouldn't be a problem again. Lastly do not fertilise your plant after root rot for a few months!
Another product that'll help prevent the spread of root rot is non-flavoured cinnamon. After having removed the dead roots, sprinkle a thin layer onto the healthy tissue before placing into a bed of new compost.
You can treat the roots with a topical fungicide, such as organic Neem oil, or a water and hydrogen peroxide solution. Mix one tablespoon of hydrogen peroxide with one cup of water and spray the roots down well. Hydrogen peroxide can be used to kill off the organisms responsible for root rot.
Baking soda has a pH of around nine, and its alkalinity will act as poison for fungi. It will eliminate it from the roots by alkalizing the soil and preventing it from developing.
Can you reuse soil with root rot? We recommend sterilizing the soil before reusing the soil. This will ensure there were no diseases or fungus that were growing in the soil while the roots were rotting. Once the soil is sterilized, mix with new potting soil 50/50.
Spores from root rot causing agents do contaminate other plants, but the rot cannot take hold unless there is adequate moisture. Spores are not only airborne, but are also carried by insects and other arthropods in the soil.
Some plants die rapidly, while others only show signs of disease during periods of stress such as drought. Root rot spreads between plants by root-to-root contact and by the release of microscopic spores that can move through the soil.
It is perfectly safe for plants when properly diluted and used in moderation. Adding hydrogen peroxide to water promotes better growth in plants and boosts roots ability to absorb nutrients from the soil. Diluted 3% peroxide adds needed aeration to the soil of plants and helps control fungus in the soil.
The benzimidazole fungicides such as thiophanate-methyl are very active against the fungus and are used as soil treatments to control it.
Mix 50ml of Hydrogen Peroxide 3% – Oxygen PlusTM per 4 litres of water (60:1 ratio of water to H2O2). Soak the roots into this solution for about 6 hours. Replant in a new container with clean, fresh potting mix. Water with the same solution and leave in the shade for a few days.
If you use a higher concentration of hydrogen peroxide on the foliage of the plant you run the risk of burning it. You could burn the roots, but since it's necessary to kill the root rot-causing bacteria, it's a risk worth taking.
By strategically sprinkling cinnamon around the edge of containers and baskets, most pests will simply leave it alone and move on. Even with its strong smell, cinnamon will not cause any harm to the plants.
Depending on the circumstances and severity of over-watering your roots may need more time for recovery than others! The good news is that most plants will bounce back between 7-14 days if they're given proper care (which includes rehydration).
Hydrogen peroxide or bleach can be used to sterilize the soil and kill the fungus spores.
Underwatering: In some cases, not watering your plant enough can eventually lead to root rot too. Roots begin to shrink and shrivel when their soil is too dry. If you forget to water your plant for a while and then flood it with moisture, it can shock the now-fragile root system.
Apart from being more mindful of how often and how much water you give your plants and plant roots, you can also use a mixture of 3 percent hydrogen peroxide concentration mixed in 1 quart of water once a week to encourage healthy root growth in your plants' roots or treat the spread of root rot and root decay.