Prevent Root Rot with These Easy Tips
- Lauren Imbruglia
- Oct 27
- 4 min read
Root rot is a common and destructive problem that affects many plants, both indoors and outdoors. It's also one of the most common issues we encounter when repotting our clients' struggling plants. It occurs when roots are exposed to excessive moisture, leading to fungal infections that can kill your plants if not addressed promptly. Understanding how to prevent root rot is essential for the health of your green babes. Here's our best tips with practical, expert advice on avoiding root rot and keeping your plants vibrant.
Understanding Root Rot and Avoiding Root Rot Mistakes
Root rot is caused primarily by overwatering and poor (or no!) drainage. When soil remains soggy for too long, it creates an environment where fungi like Phytophthora and Pythium thrive. These fungi attack the roots, causing them to decay and lose their ability to absorb water and nutrients.
Common mistakes that lead to root rot include:
Using pots without drainage holes
Overwatering plants regardless of their water needs
Planting in heavy, compacted soil that retains water
Ignoring signs of poor root health such as yellowing leaves or wilting
To avoid root rot, it is crucial to understand your plant’s specific watering needs and soil preferences. For example, succulents and cacti require much less water than tropical plants. Adjust your watering schedule accordingly and always check the soil moisture before watering.

Practical Tips for Avoiding Root Rot in Your Garden and Home
Preventing root rot starts with creating the right environment for your plants. Here are some actionable tips:
Choose the Right Pot and Soil
Use pots with drainage holes to allow excess water to escape. Select a well-draining soil mix suitable for your plant type. For example, cactus soil mixes are ideal for succulents, while a nice chunky soil with some amendments like bark chips and perlite works well for most houseplants.
Water Wisely
For most (not all!) houseplants you should water your plants only when the top inch to two inches of soil feels dry. Avoid watering on a strict schedule without checking soil moisture. Use a moisture meter if needed, but we find that a finger, chopstick or pencil is more visual and accurate. There will be exceptions to the 1 to 2 inch rule...for example, Snake plants and ZZ plants. Some plants want their pot to dry out 50%. We let you know when you purchase your plant from us.
Improve Drainage
Add perlite, sand, or bark chips to your soil to enhance drainage.
Avoid Waterlogging
Never let your plants sit in standing water. Empty saucers under pots after watering.
Regularly Inspect Roots
When repotting or if you notice plant distress, check the roots. Healthy roots are white and firm, while rotting roots are brown, mushy, and smell unpleasant.
Use Fungicides When Necessary
If you suspect fungal infection, treat the soil and roots with appropriate fungicides to stop the spread. We can suggest a great non-toxic product that is copper-based and we can either source it for you or you can use this discount link.
By following these steps, you can significantly reduce the risk of root rot and keep your plants healthy.
Can Hydrogen Peroxide Stop Root Rot?
Hydrogen peroxide is often recommended as a home remedy for root rot because it releases oxygen when it breaks down, which can help kill anaerobic bacteria and fungi in the soil. But can it really stop root rot?
The answer is yes, but use with caution. Hydrogen peroxide can be effective in treating mild cases of root rot by:
Disinfecting the soil: It kills harmful pathogens without harming beneficial microbes if used in diluted form.
Oxygenating roots: The extra oxygen helps roots recover and prevents fungal growth.
To use hydrogen peroxide safely:
Mix one part 3% hydrogen peroxide with four parts water.
Water the affected plant with this solution once a week.
Avoid overuse, as too much hydrogen peroxide can damage roots and beneficial soil organisms.
While hydrogen peroxide can help, it is not a cure-all. It works best combined with other root rot prevention strategies like improving drainage and adjusting watering habits.

How to Identify Early Signs of Root Rot
Early detection is key to saving plants from root rot. Watch for these signs:
Yellowing or wilting leaves despite adequate watering
Stunted growth or sudden leaf drop
Soft, mushy roots when you inspect the plant
Foul smell coming from the soil or roots
Black or brown discoloration on roots
If you notice any of these symptoms, act quickly by removing the plant from its pot, trimming away affected roots, and repotting in fresh, well-draining soil. Treat the plant with fungicide or hydrogen peroxide solution as needed. (Discount link here)
Long-Term Strategies for Healthy Roots and Plants
Maintaining healthy roots requires ongoing care and attention. Here are some long-term strategies:
Keep your plants in an appropriate sized pot - no more than 1 to 2 inches larger than the root ball
Use sterilized tools when pruning or repotting to avoid spreading pathogens.
Incorporate organic matter like compost to improve soil structure and microbial health. We absolutely LOVE using Grow, by We The Wild, every other time we water.
Avoid overcrowding plants to ensure good air circulation around roots.
Monitor watering habits seasonally, as plants need less water in cooler months.
For more detailed advice on root rot prevention, we would be happy to schedule a 15 minute virtual plant consultation. Here's our scheduling link: BOOK HERE
By adopting these practices, you can create a thriving environment where your plants’ roots stay strong and disease-free.



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