Posts Tagged ‘controlling snow mold’

Snow mold on the lawn

Snow on the top of Mother Myrick Mountain - from Mom's deck

Snow on the top of Mother Myrick Mountain – from Mom’s deck

Spring is slowly coming to southern Vermont where I have been visiting with my mom for the past week. This area of Vermont is definitely several weeks behind the Shenandoah Valley but a few sunny days here have edged into the 60’s and the snow is gradually beginning to melt away. There are still a few patches here and there in the woods and along the road, and of course, quite a bit of snow remains on the mountains. But spring is definitely creeping in. The goldfinches that come to the feeders are becoming brighter yellow every day!

When I first arrived, many sections of the lawn were still covered with snow.

Gray snow mold

Gray snow mold covers the lawn.

In places where the snow had recently melted off, I noticed that there were large patches of gray mold covering the grass. I was pretty excited – this was a great example of snow mold and it had been a while since I’d seen this in the lawn. It reminded me of a post we had on our discussion board a few years ago:

Last Spring I had powdery mildew on my front lawn which faces north. It only gets sunlight late in the afternoon. It stunted the growth of the grass but fortunately did not kill the grass. Is there anything I can do to prevent the powdery mildew from recurring next spring?

What they were seeing was probably snow mold rather than powdery mildew. Snow mold is often seen on the lawn in the spring after the snow melts. It is especially common when heavy snow has fallen on unfrozen ground.

A patch of gray snow mold

A patch of gray snow mold

There are two types of snow mold; gray snow mold (Typhula spp.) which usually only infects the grass blades, and pink snow mold (Microdochium nivale) which may infect the crown and the roots of the grass as well as the foliage and can thus be more damaging. With the late winter and early spring snow storms we have had this year, snow mold may be a more common sight this spring.

Snow mold (and powdery mildew for that matter) is generally not a serious problem and fungicide applications are usually not recommended.

The normal recommendation is to simply rake the area lightly to allow the grass to dry more quickly. The raking also disrupts the growth of the fungi.

Snow moldIncreasing the amount of sunlight that reaches the lawn through the selective pruning of a few trees can help reduce the growth of mold and mildew on the lawn.

In most cases, the grass will recover and green up – perhaps just a little slower than the rest of the lawn. However, sometimes small patches of grass may be killed by snow mold. These areas can be overseeded and top dressed with a thin layer of good quality compost in the spring.

As you can see from the photos, Mom had some pretty dense patches of snow mold growing on her lawn but actually after a few windy days with lots of sun, the grass has dried out and the snow mold has disappeared with no treatment at all. The lawn is even beginning to green up a bit!

It’s a balmy 57 degrees right now!

Until next time – Happy Spring everyone!

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