Dark, slimy roots mean root rot

When leaves turn yellow or brown and the roots underneath are black or dark brown and slimy, the plant has root rot. It is usually caused by excess watering over time, or by a plant that has simply been growing in the system for too long. Root rot can spread through the tank water to other plants on your stand, so it is worth acting quickly.

Steps to resolve

  1. Pull the cup out and look at the roots. Healthy roots are white or cream; black or dark brown, slimy roots mean root rot.
  2. Decide whether to discard the plant or try to treat it. Discarding is the safest way to protect neighboring plants.
  3. To treat it, trim back all of the dead, dark or slimy roots with clean scissors.
  4. Soak the plug for 15 minutes in a solution of 1 part 6% hydrogen peroxide to 5 parts water, then return it to the stand.
  5. Change your tank water soon so root rot does not spread to the other plants.
  6. Add 2 capfuls of purple Arber to the tank every week to help combat root rot.

Helpful products

Reset Bundle - Lettuce Grow

Arber Plant Protection

$18.49