Can I cut aerial roots?
Written by
Olivia Mitchell
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Aerial roots of ferns have important functions, so maintaining healthy ones is essential. The fuzzy roots can absorb moisture and nutrients directly from the air. Cutting them induces unnecessary stress in the plants and lowers their vigor. I almost lost my rabbit's foot fern after I cut back its live roots. At that time, I did not understand the role of the aerial roots. Healthy aerial roots are important for optimal fern health.
Vital Roles
- Absorb atmospheric humidity in dry conditions
- Capture nutrients from surrounding air particles
- Provide structural support for climbing varieties
- Store moisture reserves during drought periods
Trimming Protocol
- Sterilize tools with alcohol before cutting
- Cut only completely dried or damaged sections
- Make clean 45° cuts to prevent tearing
- Disinfect tools after each root trimming
Health Indicators
- Plump silvery roots show good hydration
- White tips indicate active nutrient absorption
- Brown shriveled sections need removal
- Mushy texture signals rot requiring action
A healthy aerial root will feel firm to the touch and be a silvery-white color. If any part of the aerial root is damaged, you may notice crispy brown parts or mushy sections. In these situations, it is best to routinely mist the aerial roots to keep them functional, without trimming them. I spray them daily, using a spray bottle filled with filtered water. Keeping the aerial root system intact is crucial for the health of your ferns.
Following the correct trimming practices helps to prevent the spread of infection. When trimming, make clean cuts above the safely made damage in the damaged area with a sharp pair of scissors. Never pull or tear the roots, because this can cause further wounds. After cutting, you can sprinkle cinnamon powder on top of the cuts as a natural antiseptic. You want to isolate the plants you trim until the callous forms over where they were cut, which will prevent disease transmission.
Humidity support is necessary for recovery. Raise humidity levels to around 60% by adding pebble trays with water near plants that have been impacted. Do not fertilize until you see new root growth, which typically occurs within three weeks. Evaluate progress weekly and look for new white root tips developing.
Prevent future issues through environmental control. Maintain consistent humidity to prevent root desiccation. Ensure good air circulation to discourage fungal problems. Your attentiveness keeps aerial roots functional and attractive.
Read the full article: 8 Expert Tips: How to Care for Ferns Indoors
