Snow Mold Description:

Pink snow mold is a fungal disease that creates patches of dense, whitish-pink grass blades in winter and spring.


Annual bluegrass and bentgrasses are most commonly affected by pink snow mold. Kentucky bluegrass and ryegrass are susceptible, but tend to be less severely damaged.

Biology & Symptoms:

The pink snow mold fungus is active during periods of high humidity when temperatures are 32°F to 60°F. Lack of nutrients in the turf and excessive layers of dead grass called thatch encourage development. The fungus grows throughout early winter and spring, and can be present with or without snow cover. Affected lawns become slimy and matted and are invaded with brown patches and whitish-pink mold growth.

How to Treat Snow Mold in Lawns:

There are a number of ways to manage pink snow mold, beginning with raking affected areas of turf. The mold seldom attacks grassroots, therefore, raking out stems of matted grass and reseeding the lawn will encourage new healthy growth. In addition, decreasing soil compaction and improving drainage will help reduce the disease. Talk to a landscape professional about the best practices for maintaining your soil. Common methods are removing excessive thatch from the grass in the fall, or aerating the soil to allow for better flow of water and nutrients throughout the roots. Your arborist or landscape professional may recommend testing affected turf to confirm if pink snow mold is affecting your lawn. Typically, proper care will quickly restore lawn health, eliminating the need for fungicide treatment.

See More Articles

Armyworms Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn

Fall Armyworms

Fall armyworm caterpillars eat the leaves and stems of turfgrasses, but typically do not destroy the crown of the plant. Early feeding damage can resemble drought stressed turf, but can quickly progress to complete browning of the entire stand when caterpillars are present in large numbers.
Read More
Pest And Disease Center Leaf Spot And Melting Out Banner 1440X500
Brown, Spotted, or Patch Grass on Lawn

Leaf Spot & Melting-Out

Leaf spot and melting-out are turfgrass fungal diseases that can cause indefinite yellowing and thinning of grass, as well as large patches of dead turfgrass.
Read More
DSC 8019
DSC 8019

Get In Touch With Us!

We pride ourselves at Davey Tree on providing prompt, professional and personalized service from certified arborists that live, work and engage in your community. Contact one of our Davey Tree specialists for your residential needs.

Let's Find What
You're Looking For!