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PLEASE NOTE: In the autumn of 1995, we hatched the idea for a free, local gardening publication. The following spring, we published the first issue of Michigan Gardener magazine. Advertisers, readers, and distribution sites embraced our vision. Thus began an exciting journey of helping our local gardening community grow and prosper.
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Archive for the oaks tag

Growing grass under trees

June 18, 2019   •   Leave a Comment

Our yard is shaded by oaks. We overseed every year with shady grass mix. But by the next spring most of the grass has died. What can we do to grow grass in this situation?

You have a couple of choices. You can continue the frustrating cycle of growing grass, or take an alternative approach to living with your oaks. Turf grass needs sun to germinate and establish a root system, even if it is the “shady grass mix.” If your oak canopy is heavy and dense, you could have the canopy judiciously thinned by a trained arborist. They will prune when the trees are dormant in winter and there is little chance for them to be infected with the oak wilt disease. This might open up the canopy enough to let the turf lawn get established.

However, you should know that oak trees can take up to 50 gallons or more of water a day. So while you are watering that lawn you’ve overseeded, the oak trees with their extensive root systems are enjoying the feast. The turf grass never gets its root system established because the oaks are not only shading it out, but also absorbing most of the water.

This is not necessarily a bad thing. Oak trees are preferable bastions of shade. The alternative is to try a different groundcover that isn’t lawn. Oak trees create dry shade. It sounds like your lawn is fairly thin underneath them, which is why you keep overseeding every year. Why not plant dry shade-loving perennials? There are a number of low maintenance plants that would not only lend interest to the landscape under the oak trees, but are low profile, will come up every year, will succeed where turf grass fails, and will provide “green coverage” that you don’t even have to mow.

Consider a mass planting of variegated hostas that would “light up” the shady area under the canopy. Another perennial often used where grass is unsuccessful is lily turf (Liriope spicata). It even looks like grass, but has the bonus of a purple-blue flower in summer, which turns to a red-brown berry in fall. At the outer edge or drip line of the canopy, you could mass plant Stella d’Oro daylilies. They tolerate a wide range of soil types and light conditions. Their yellow blooms are continuously cheerful and when finally done blooming, their foliage lasts until frost. A simple ground-hugging vine is vinca, sometimes called myrtle. It produces a lovely blue flower in spring that shows well in heavy shade. There is also the nice spotted dead nettle (Lamium maculatum) with its silver and green mottled leaves. The cultivar ‘White Nancy’ produces a lovely white flower while other varieties produce pink blossoms mid-spring.

So there are several alternatives and choices to groundcovers that aren’t turf grasses. You need to decide where to put your money: into perennials that will succeed in the shade of your mighty oaks, or continue trying to grow turf grass that will always struggle.

Filed Under: Ask MG Tagged With: grass, growing grass, oaks, shade, trees

Michigan government, nonprofits and corporations collaborate to fight Oak Wilt

September 17, 2017   •   Leave a Comment

Oak Wilt is lethal to many oak species, including red oaks, pin oaks and black oaks. (Photo courtesy: michiganoakwilt.org)
Oak Wilt is lethal to many oak species, including red oaks, pin oaks and black oaks. (Photo courtesy: michiganoakwilt.org)

The Oak Wilt Coalition is a new partnership between private, nonprofit and governmental organizations to help increase awareness about the serious threat of oak wilt disease in Michigan. Oak wilt is a fungal disease that is spreading among trees in Michigan and many other states. It has been confirmed in much of the Lower Peninsula and in the western portion of the Upper Peninsula, as shown in this 2016 oak wilt map.

This disease is lethal to many oak species, including red oaks, pin oaks and black oaks. It can be transmitted by insects moving to fresh wounds on trees, including those caused by pruning. The fungus also can spread through root systems, causing death of nearby oak trees. “Oak wilt initially causes wilting of leaves, ultimately killing otherwise healthy trees within a matter of weeks,” said DNR forest health specialist Roger Mech. “The effects can be dramatic and costly when mature trees die and are removed, especially in highly maintained landscapes, parks and recreation areas.” Mech said that prevention and management are possible with disease awareness, proper identification and timely response.

Led by the Arboriculture Society of Michigan, the partnership also includes representatives from the Michigan Association of Conservation Districts, the Michigan Department of Natural Resources, the Michigan Department of Agriculture and Rural Development, Michigan State University, ReLeaf Michigan, and various electric utility companies and tree-care companies.

To find out more, visit: www.michiganoakwilt.org

Filed Under: Clippings Tagged With: disease, oak wilt, oaks, wilting

Spring is the time to stop pruning oak trees

May 9, 2015   •   Leave a Comment

MSU Extension:

Fresh pruning wounds of oak trees attract beetles that spread oak wilt. It is critical to not prune oaks from April 15-July 15 in Michigan.

Oak wilt is an aggressive disease that affects many species of oak (Quercus spp.). It is one of the most serious tree diseases in the eastern United States, killing thousands of oaks each year in forests, woodlots and home landscapes. Oaks in the red oak group, distinguished by oak leaves with pointy lobes (Photo 1), are much more susceptible to the disease than white oaks, distinguished by oak leaves with rounded lobes. However, all oaks can be affected.

Read the rest of the article…

Filed Under: Clippings Tagged With: Michigan, oak, oak tree, oak wilt, oaks, pruning

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