• slide
  • 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.

Related

Upcoming Webinars & Appearances


Feb. 8, 2023
WEBINAR: 
Indoor Container Garden Design & Display Ideas 
Register now

Feb. 10-12, 2023

PBS Wisconsin
Garden & Landscape EXPO

Madison, Wisconsin

Feb. 15, 2023
WEBINAR: 
10 Tips for Growing Better Dahlias! 
Register now

Feb. 17-19, 2023

NARI Milwaukee Spring Home Improvement Show
West Allis, Wisconsin

Feb. 22, 2023
WEBINAR: 
Grow Beautiful Water Gardens

Register now

March 1, 2023

WEBINAR: 
How and When to Prune Shrubs

Register now

March 4, 2023
Milwaukee Public Libraries
Milwaukee, Wisconsin

March 8, 2023 
WEBINAR:
Grow Your Own Flowers for Bouquets

Register Now

March 11, 2023

Home, Lawn & Garden Day
Bloomington, Illinois

Watch Melinda's past webinars ON DEMAND

Learn More

Book an Appearance

Learn More

Enter to Win this Honey Rose Dahlia Collection with six outstanding dahlias!

ENTER NOW