Invasive emerald ash borer

Q. Our west-facing backyard patio had been shaded by four tall ash trees. Because of emerald ash borer, the trees are dying and being cut down. Can you suggest appropriate shade trees to plant? Our main sewer line runs in the area, so we want to be careful of that. At our age – fast-growing trees would be a plus!

Frank from Youngstown

A. Emerald ash borer has devastated thousands of trees in the Mahoning Valley. The invasive pest is destroying ash trees faster than we can deal with the dead trees left behind. In the woods, dead ash trees may not be an issue, but in our home lawns and along streets – they are a danger to people and property. So removing the dead ash trees is the safest bet. You can learn how these trees can “snap” off soon after death at http://go.osu.edu/ashsnap . Details about hiring an arborist and other information is at http://emeraldashborer.info

There are 82 trees on the list of replacements for ash trees, so the options are many. An underplanted tree is the little leaf linden. . If replacing more than one tree, we suggest tree diversity in your yard and garden. Frank should plant four different trees that will provide shade, but that do not get the same disease and insect issues.

Here is a list of replacement trees with details to help you select the perfect tree for your space: http://go.osu.edu/replacement

When it comes to sewer lines in the yard, we all have them. So try to plant as far from these lines as you can. The trees will seek the sewer lines if there are cracks, and if the trees need water and nutrients – they will seek these wherever they are available. Your best bet is to avoid trees that grow fast and have aggressive roots. Examples are poplar, basswood, tuliptree, most maples, some oaks and some others.

Here is a factsheet on choosing sewer safe trees, including a list of suggested trees: http://go.osu.edu/sewertrees.

Many of us want fast-growing trees to be sure we see the results of our planting trees. But beware of fast-growing trees, as some of them tend to be weak.

Here is a factsheet with a list of such trees: http://go.osu.edu/fastgrowingtrees.

Before you plant any tree, start with making a list of what you desire, along with the location of overhead electric/cable lines and other aspects of where you will plant the tree. Planning will make all of the difference. Whatever your choice to replace ash, try to purchase the largest one you can afford and watch it grow. A tree is something you will enjoy for years and so will the next generation.

Eric Barrett is OSU Extension educator for agriculture and natural resources in Mahoning County. Call the office hotline at 330-533-5538 to submit your questions. Regular clinic hours are 9 a.m. to noon Mondays and Thursdays.