What to Do About Mushrooms Growing at the Base of Trees

What to Do About Mushrooms Growing at the Base of Trees

Usually, new growth on our landscape is a good sign. What could be more pleasing than lawns full of thick, green blades and trees budding with crisp leaves or vibrant flowers?

Just when you thought there wasn’t a sprout you couldn’t love, mushrooms popped up at the base of your tree. Are they inherently bad for your tree? Not always! Many mushrooms form beneficial connections with the tree's roots.

But there are harmful fungi out there, too, like honey fungus. This is a particularly dangerous mushroom that grows near tree roots.

Learn how to identify honey fungus, how this fungus hurts trees and how to manage it.

Mushrooms Growing on Tree Roots–Identification, Facts and Treatment

What does honey fungus look like? How can I identify it?

Look for yellowish-brown mushrooms growing in clusters at the base of your tree or around your tree’s roots. There’s usually a distinct white ring around their stems, and when in peak condition, they have flat tops.

You’ll likely see these mushrooms between late summer and early winter. If you suspect it might be honey fungus, breathe in. It’s called honey fungus because of its sweet smell.

Also, look for:

  • Small and pale leaves

  • Early leaf drop or early fall coloring

  • Unusually concentrated and substantial growth of flowers or fruit

  • White fungus growing under the bark with a distinct mushroom smell

What types of trees do honey fungus attack?

The fungi are especially attracted to oak trees. But birch trees, fruit trees and hedge plants are other common victims.

Tell me some facts about honey fungus. What does it do to trees?

The fungus attacks and decays tree roots, and eventually may kill the roots entirely. And since the rot is at the base of the tree, the fungus eats the wood and bark there, causing the tree to become unstable. From there, the tree is at risk of breaking at the base and falling.

Once honey fungus invades roots, it’s tough to control, which is why prevention is the best option.

Avoid practices that invite honey fungus, such as:

How can I treat or manage honey fungus?

Unfortunately, these persistent mushrooms can’t be treated with a fungicide. And the fungus can be quite devastating. Honey fungus spreads underground, so have a certified arborist inspect nearby plants as well.

Often, the best course of action is to remove and destroy infected plants to keep the fungus from harming other plants in your yard. If the infection is less severe, you can transplant the tree. Though, this rarely happens.

If you suspect your tree has honey fungus, contact your local arborist immediately.

  • The Tree Doctor September 11, 2018 >Hi Tora, It is important to note whether the mushrooms are growing from wood on the tree itself or growing from the soil/mulch surrounding the base of the tree. If growing from the wood, they indicate the presence of decay in the wood which can indicate loss of root function. The severity depends on the size and number of roots affected. Decay in wood can typically not be cured, but your young tree may be able to produce new roots to replace those lost, depending on the severity. I would highly recommend having a certified arborist come out to take a look at the tree. They will be able to provide you with an accurate diagnosis and prescribe a treatment plan accordingly. Unfortunately, Davey Tree does not service your area. Here is a resource that can help you with hiring a certified arborist or reputable tree care company: http://www.davey.com/arborist-advice/articles/hiring-a-tree-service-provider-or-an-arborist/. Hopefully, this helps. Best of luck to you, Tora.
  • Tora Taylor September 8, 2018 >i planted an autumn blaze maple tree in my front yard in March and for the last fee fays i have noticed that mushrooms have grown from the root of the tree. i just walk up to it and kick it off. wjat should i do to stop it and save my tree? Please help this is my dream tree and a new house and i dont want to lose it.😭
  • The Tree Doctor June 14, 2018 >Hi Pamela, I highly recommend that you have a certified arborist come out and inspect the tree. Those can be signs of decay that could be weakening the base of the tree. A certified arborist will be able to make an accurate diagnosis and prescribe a treatment plan if possible. Unfortunately, Davey Tree does not service your area. Here is a resource that can help you with your search: http://www.davey.com/arborist-advice/articles/hiring-a-tree-service-provider-or-an-arborist/. Most reputable tree care companies will provide a quote at no charge to you. Best of luck to you. Here if you have any more questions, Pamela.
  • Pamela Weston June 13, 2018 >I have these half mushroom looking things growing out of the base of my very large very old oak tree. I found a soft spot near them at the base of the tree as well. The tree has had some poor branch cutting to it as well so their are some holes where the branches were cut. I love this tree and want to save it. Am I going to be able to save it? I have someone that feels if they trim the canopy so that air can get to it and the nutrients can get to the tree it might heal itself.
  • The Tree Doctor April 25, 2018 >Hi Mr. / Mrs. Oxenham, We strongly recommend you contact a certified arborist in your area to examine your tree. Some species of shelf fungi can indicate the presence of serious defects or decay inside your tree. Defects, if severe, may indicate your tree could fail, resulting in injury or property damage. Unfortunately, Davey Tree does not service your location based on the zip code provided. Here is a resource that should help you find a certified arborist willing to provide a consultation at no charge to you: http://www.davey.com/arborist-advice/articles/hiring-a-tree-service-provider-or-an-arborist/. Good luck! Here if you have any more questions.
  • A Oxenham April 19, 2018 >Could you please tell me wether I can plant something around a tree that has a large flat fungi growing at the base
  • The Tree Doctor September 18, 2017 >Hi there. Sending us a photo will definitely give us a better idea of what’s going on with your tree! You can send us photos to blog@davey.com. Look forward to hearing from you.
  • J Troxell September 15, 2017 >we have mushrooms growing at the base of our huge oak tree that's over 100 years old. We are concerned that these may be the mushroom that causes the honey fungus. We are very concerned because the tree is right over our home. I tried to include a photograph but won't let me here.
  • The Tree Doctor September 14, 2017 >Hi Lori. Oh no! To make the best recommendation for you, though, we would need photos of the mushrooms. You can send photos to blog@davey.com. We look forward to hearing from you, Lori.
  • Lori Cooper September 14, 2017 >He ree in front of my home, had mushrooms growing at the base, and it now has mushrooms growing along the upper parts of the trunk. Two trees in my neighborhood have fallen already,so I'm sure the disease is known, I have asked the city to cut it down, as it is on the parkway and doesn't belong to me, but no action thus far.
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