Siesta Key landscape Logo - Siesta Key - Sarasota Florida

Siesta Key & Sarasota, FL


Siesta Key landscape Logo - Siesta Key - Sarasota Florida

Siesta Key & Sarasota, FL

Font size: +

Ganoderma Palm Disease

Can You identify this palm disease in the landscape. Once a Palm is dead and cut down it’s extremely important to remove the stump or grind the stump to eliminate any other palms from contamination.


This palm disease is extremely dangerous to any palm, it spreads easily through pruning shears or chainsaws and there are no current treatments for this disease. The hard, Brown mushrooms are the fruit from the disease and should be carefully removed then immediately disposed of in the trash.

The unique shape and rich textures of Palm Trees have become a symbol of the Florida lifestyle and their durability and adaptability have made them a favorite of landscape designers in the warmer parts of the state, but these hearty plants can succumb to a variety of diseases including Ganoderma.

Ganoderma zonatum, the pathogen that causes Ganoderma Palm Disease, was first identified by scientists at the University of Florida’s Fort Lauderdale Research and Education Center in 1994. This lethal and incurable disease which affects mature palms can easily spread through pruning shears or chainsaws and it is important to remove or grind the stump, once a tree has been cut down.

In the early stages of Ganoderma Palm Disease, the older fronds droop and turn brown, and new growth slows and becomes pale green or yellow. As the older fronds continue to die, the younger leaves begin to wilt and turn brown at the tips. Infected trees will usually die 6 to 12 months after the initial symptoms appear. Some trees have been known to hang on for several years, but they should be removed once the disease is identified in order to prevent further contamination.

Other symptoms include “bleeding”, a reddish secretion that stains the trunk, and the formation of a conk or bracket fungus on the lower part of the trunk as seen in these photos. This conk is the reproductive body or fruit of the disease and it should be carefully removed and immediately disposed of to protect neighboring palms. The presence of this hard, brown mushroom is proof that the tree has Ganoderma, but the absence of the same does not mean that a palm may not be infected.

The fungus starts out as a small, white blob that is flat against the tree. As it grows, it begins to jut out like a shelf, its texture becomes woody, and its color changes to a shiny brown with bands of reddish and lighter shades of brown. At maturity, the conks swell around the edges revealing a white surface where millions of spores are produced. These spores are then transported to other palms by the wind.

You should avoid replacing the removed palm with another palm because any fungus still present in the soil or root system of the diseased palm could infect the new palm. If you do are set on another palm, you should remove all of the old roots and replace the soil with new soil, but your best bet is to plant something other than a palm tree in that spot.

If you see the telltale conk or otherwise suspect that your palms have become infected with Ganoderma and you are in Siesta Key, Longboat Key, Lido Key or the surrounding areas of Sarasota County, call Siesta Key Landscape at 941-379-3479.

Preparing a Sports Field before Puting Grass Down
Zoysia Grass for a Golf Course perfect lawn
Comment for this post has been locked by admin.


24 June 2017
Siesta Key Landscape Blog
Have a problem w your palms and not sure what it could be? Palms are very unique plants and are not like most trees. They require a very specific amount of fertilizer compared to turf grass. They can ...
20 February 2019
Siesta Key Landscape Blog
A Casey Key home we did the landcaping for was recently featured in an article for Detroit Home Magazine. A respectful innovation of an original 1940s Florida cottage honors the best of the past and p...
04 April 2019
Siesta Key Landscape Blog
When you land one of the last original bungalows in paradise, only the best will do and that includes landscaping by Siesta Key Landscape! Check out the Detroit Home article of this Casey Key gem that...
28 April 2020
Siesta Key Landscape Blog
Backyard walkways and paths are a great way to connect parts of your yard and create separate areas within it. Residential and commercial landscapes can benefit from various types of walkways and path...
23 April 2021
Siesta Key Landscape Blog
Immediately recognizable to most Floridians, mangroves, with their distinctive root systems that dot the muddy shores of rivers and estuaries around South Florida, play an important ecological role. T...
19 September 2016
Siesta Key Landscape Blog
Many of you may have read about the recent (August 2015) aerial spraying of Naled in Dorchester County, South Carolina. That spraying unintentionally killed millions of honeybees while attempting to c...
05 October 2023
Siesta Key Landscape Blog
Unlike the “AstroTurf” of yesteryear, today’s artificial turf looks and feels like natural grass, minus the weeds and brown patches, and it has myriad advantages over a traditional lawn. For starters,...


4030 Sawyer Ct
Sarasota, FL 34233
Phone: 941 379 3479

Siesta Key

221 Beach Rd Ste 171
Sarasota, FL 34242
Phone: 941 379 3479


Copyright © 2021 Siesta Key Landscape. All Rights Reserved. Powered by Concept Digital Media

Accessibility Statement