Toadstools and White Spores in Garden Border

A gardener found large toadstools with masses of white spores in soil where a rose and ceanothus died.

Assessment

• Mushrooms are likely saprophytic (decomposing organic matter), not pathogenic.
• Plant deaths may be from root disease, but mushrooms are coincidental.

Actions

1. Treat area with Agri-Fos (Monterey)—broad-spectrum homeowner soil fungicide.
2. Test drainage: 12" hole, fill with water. If >4 hours to drain, improve drainage or choose water-tolerant plants.
3. Mushrooms indicate active decomposition—generally a good sign for soil health.

Focus on drainage and targeted fungicide; don't panic over mushrooms.