• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Dog Vomit Fungus

It’s foamy, slimy and rather disgusting to look at.  And nothing describes it better than its common name – dog vomit fungus. 

This slime mold often appears on woodchip and cocoa bean shell mulches during rainy weather.  It starts out bright yellow and eventually turns tan, dries and disappears.  It feeds on dead organic matter, such as mulch, and is not harmful to the plants.  It’s just ugly to look at.

I have seen it slime up the sides of trees and flowers.  Just wait for the weather to dry and it will disappear.

You can remove large patches in the mulch to improve the view, rake to break apart the mold and speed drying or just wait for the weather to improve and watch as it dries up and disintegrates.

Prevent the problem by lightly raking the mulch during extended wet periods.  This dries the mulch, creating a less desirable location for the slime mold to form. And for those using cocoa bean shell mulch, you may want to mix in rice hulls to help reduce this problem.

A bit more information:  Avoid using mulch from black walnut trees.  All parts of this tree, including leaves, nuts, husks and woodchips, contain juglone which is toxic to many plants.  Instead, compost this material.  Once it is fully decomposed, you can use it as a soil amendment in your landscape.

Upcoming Live Events
& Webinars


Feb. 28, 2024
FREE WEBINAR

Create a Beautiful Landscape Free of Invasive Plants in Wisconsin Gardens
Register now

Feb. 29, 2024
FREE WEBINAR

How to Plan Your Rain Garden
Register now

March 6, 2024
FREE WEBINAR

Growing Summer Bulbs in Containers
Register now

March 13, 2024
FREE WEBINAR

Hydrangea Selection, Pruning & Care
Register now

March 14, 2024
FREE WEBINAR

How to Select Rain Garden Plants
Register now


March 20, 2024
FREE WEBINAR

Maximize the Beauty and Enjoyment
in Any Small Space
Register now

March 23, 2024

REALTORS Home & Garden Show
West Allis, WI

March 27, 2024
FREE WEBINAR

How to Start a Garden for Beginners
Register now

April 10, 2024
FREE WEBINAR

Container Gardening Throughout the Year
Register now

April 11, 2024
FREE WEBINAR

7 Steps to Managing Water Where it Falls in Your Yard
Register now

April 20, 2024
Pasquesi Home & Gardens
The Why and How of Pruning Hydrangeas and Other Shrubs
Lake Bluff, IL

WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter to win Longfield Gardens bulbs valued at $157.00 !

ENTER NOW