Don't Trim that Oak Tree!

There are many variables that I have to discuss with my home buyers when we start a search for their new home. Home layout, bedrooms, garage space, school district are just a few of the topics that are covered. But many home buyers want trees! Yep, the white picket fence on a wooded lot with a mature tree that would be perfect for hanging a tire swing from just like it the movies. In Hollywood, trees don't die though but in real life, just like everything else, trees can require maintenance. 


In many counties of Minnesota, oak wilt is prevalent. It is a nasty disease that can cut down a mighty oak in it's prime. Keeping the fungus at bay takes forethought when doing spring and summer yardwork.

What is Oak Wilt?

Oak wilt is a disease caused by a fungus that destroys the entire central system of the tree from its  roots to the tips of its leaves. The tree will try to block the fungus, but in doing so it blocks all water and nutrients to the branches and leaves. Eventually, the tree's leaves will begin to wilt then dry up and the tree will die.

Oak wilt spreads in two ways. It will either be attacked through the root systems of near by trees or by fungus beetles that carry the oak wilt spores from tree to tree. For additional information on oak wilt from the University of MN Extention Service

Here are a few important reminders to prevent the spread of Oak Wilt:

•     To prevent the spread of devastating disease, it is imperative to follow the guidelines for oak wilt prevention. Do not prune, damage or cut down oak trees during the spring and summer growing season from May 1 through September 30.

•     During the spring and early summer months of May and June, oaks are at especially high risk to this highly contagious disease.

•     Any wood or branches taken down over the winter that is infected with oak wilt needs to remain covered under black plastic and completely sealed until after July 1.

•     During the summer if you sustain storm damage and lose a limb from an oak on your property, immediately paint the wound with black tree paint to seal the wound and prevent exposure to the oak wilt fungus.

How to Protect Your Trees

• The fungus beetles infect trees that have been recently injured or trimmed. These beetles are very active in the spring and summer months. Oaks should be protected from damage and not trimmed from April through July.
• If an oak tree is damaged during a spring or summer storm, apply tree paint immediately to any wounds that accidentally occur.
• If an oak is infected a nearby neighboring property, your trees could be at risk through their intertwined root system. Oak roots travel up to 50 feet out. The fungus can pass underground from tree to tree. Roots can be cut using a trencher or vibratory plow to prevent the spread of oak wilt. The process uses a five foot blade that severs the roots to protect neighboring trees. Root cutting should be done prior to tree removal. 

Ignoring oak wilt only causes the disease to spread. Since it can take decades to grow a beautiful oak shade tree, shouldn't they be protected? A wooded landscape has a direct  affect on a property's value.



Copyright 2014 www.terieckholm.com

Need to Trim Your Oaks? WAIT & Prevent Oak Wilt!

If your oak trees require trimming, it’s best you wait until winter to prevent the spread of oak wilt. Oak wilt is devastating as massive oaks are destroyed when this disease spreads. Smart landscaping and maintenance requires you trim oaks in the winter months—before April in Minnesota. Oak trees should be trimmed in the late fall or winter months. If you have overgrown oak trees, it is important to now wait until after the first hard freeze of fall to avoid exposure to this tree-killing disease!

A few years ago I shared photos of a property in our Ham Lake neighborhood where the owners had dealt with oak wilt for a couple of years…Or in reality chose not to deal with it. In one summer alone, this property lost nearly a dozen trees.  While the beautiful thicket of mature oak trees is now just a memory, the new owners took the initiative to save the remaining oaks and with treatment and proper care lost only one small tree in over four years.

Oak wilt is not just a problem in Ham Lake or Anoka County. It is prevalent in communities from Lino Lakes to North Branch and Forest Lake to Stacy. Whether you live in Anoka, Chisago or Washington County, if you have oaks on your property, you need to take precautions to protect them from this deadly disease.

What is Oak Wilt?

Oak wilt is a disease caused by a fungus which attacks the central system of the tree from the roots to the leaves. The tree attempts to block the fungus, but also blocks all water and nutrients to the branches and leaves. Eventually, the trees leaves wilt and it dies.

Oak wilt spreads through the root systems of near by trees and by fungus beetles that carry the oak wilt spores from tree to tree.

How to Protect Your Trees

The fungus beetles infect trees that have been recently injured or trimmed. These beetles are very active in the spring and summer months. Oaks should be protected from damage and not trimmed from April through July.

Trim large mature oaks now. As a preventative to spring storm damage, have your large oaks trimmed now so that heavy, dead branches won’t fall during tornado season and break other healthy limbs.

Tree trimming of mature oaks is best left to professionals especially near the power lines. The trimmer should use a bucket truck or a line/pulley system, NOT spiked climbing boots which can damage the tree.

Selling a Home with Oak Wilt?

Disclose, Disclose, Disclose! A seller might be tempted to cut down a diseased tree and not say a word to the new buyer. This is a terrible idea and could cause problems after the sale. Even if a seller doesn’t say anything about oak wilt infected trees that were removed prior to listing the home, I’ll bet the neighbors will. Cutting a tree diseased tree does not prevent the spread of oak wilt. It is likely other trees are infected. If more trees die and the buyers were not properly informed, the seller could be in a legal battle with an irate buyer.

Here is the bottom-line:There is a question regarding diseased trees on the Minnesota Sellers’ Disclosure Form. Fill it out properly and be prepared to remove the diseased trees properly and safely, if asked. It is never a good idea to not tell the whole truth on the property disclosure form.

Copyright 2011 www.terieckholm.com

Shoveling in September in Anoka County MN? It’s NUTS!

Literally! Nuts…Acorns to be specific. It’s a banner year for the oak trees in our yard! Unfortunately several of the branches that provide shade on our Ham Lake driveway in the summer, drop hundreds…no thousands of acorns onto our driveway. We thought that collecting them and bringing bushels of our red and bir acorns to the DNR was a novel idea, but a 3 hour drive to Bemidji for a possible $40 a bushel is not going to happen.

So we elected to shovel the nuts after they ping like hail stones onto our vehicles. We have blown them off the driveway in the past but it doesn’t get all the acorn-butter bits that our tires have ground in during the week. Believe me, shoveling is easier than sweeping. After they are dumped onto the edge of our property, the squirrel and white-tailed deer get a one-stop smorgasbord as usually we have a few crabapples in the mix.

What fun it is to live on Minnesota acreage!

Copyright 2009 Teri Eckholm http://www.terieckholm.com/