Root Rot

Root rot sounds terminal, but it can be stopped if it's caught quickly! Root rot is a general term for any disease in which a pathogen attacks and causes deterioration of a plant’s root system.  Almost all plants are susceptible to root rot, including woody and herbaceous landscape ornamentals. Root rots can be chronic diseases or, more commonly, cause the plant's death. Plants with root rot are often stunted, wilted, or begin to die back. They may also have yellowing leaves, which can make it seem like a nutrient deficiency.  Examination of the roots will reveal stringy, soft brown tissue that easily pulls apart when touched.

The biggest reason for root rot is poorly drained, overwatered soil. If your plant is in an area that collects standing water, or you have a habit of overwatering a potted plant, the risks of root decay are much higher. Diagnosing root rot can be tricky, especially since many symptoms can mimic pest infestations.

Symptoms:

• Branches dying back

• wilted yellow or browning leaves

• Mushy brown patches on the stem

• Stunted growth

• decline in health with no visible reason

• unpleasant, mouldy smell in the soil

Root rot can be treated, but it's better to prevent it, especially with larger landscape ornamentals. For potted or smaller plants, you have to get your hands dirty to stop further decay. After you have removed excess soil from the root ball, discard it; reusing contaminated soil is not recommended. Once you’ve done this, rinse your plant's roots, then cut away all rotted roots. Severely rotted roots will pull apart easily. Sanitize your pot with a 10% bleach or vinegar solution and repot the plant with fresh soil. Use a moisture meter to prevent overwatering in the future.