Club Root Information

Club Root Information

By Jennifer Olvera, Garden Guides Contributor
Cabbage with Club Root

About Club Root

Club root,or Plasmodiophora brassicae,is a fungal disease that causes the roots of plants to swell asymmetrically. As a result, the roots are unable to absorb water and nutrients properly.

Prevention and Control

In order to prevent club root, it's a good idea to elevate soil pH to an alkaline 7.2 to 7.5 by mixing hydrated lime into soil in the fall. Add ample organic matter to improve soil drainage and check the soil pH frequently. Additionally, dipping transplants in a fungicide, like flowers of sulfur, helps to prevent attacks.

It's essential to act quickly if you suspect club root has affected your plants. Dig around the infected area, taking care to remove the root system before the club roots break apart and release spores.

There isn't a sure-fire treatment for club root, so it's recommended that infected plants are properly disposed of or burnt. Do not compost plants that have been infected with club root.

Affected Plants

All the members of the Brassica family, including broccoli, cabbage, cauliflower, Brussels sprouts and kale.


Plants infected with club root develop bulbous masses on the root system, reducing the plants ability to absorb water and nutrients. Leaves wilt and turn yellow, and the plant dies.

Natural Insecticides

Lime helps to maintain a balance between soil acidity and alkalinity, providing calcium while raising the soil's pH.

Other Methods of Control

Sewing crops in the fall when the soil is cooler helps lessen the risk of club root.

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