Hello Collette,

Wilting leaves like this usually means too little irrigation or too much irrigation. When you planted it, did you dig a hole and back fill it with native soil, or did you back fill the hole with topsoil, compost or some other amendment? You should backfill with native soil. Otherwise, the soil around the plant has different permeability than surrounding soil and you can form a “bathtub” that collects water. Oakland County has had very consistent and heavy rains this summer. This would tend to make me think over watered rather than under watered. You can lightly dig around the roots and look for soggy soil and check root health. They should be white and fibrous, not brown or black and mushy. If, on the other hand, the soil is dry and crumbly, it may be possible that you did not water sufficiently between rains. Here is a reference on transplanting stress: https://www.extension.purdue.edu/extmedia/bp/bp-31.html

If it is not an irrigation issue, then it is time to look at insect damage or disease. With the relatively warm to hot weather and ample moisture, I might consider a fungal disease. Fungal pathogens are generally species specific and this would be consistent with the rest of the plantings in the area looking healthy. Unfortunately, from this photo alone, it is difficult to identify any specific pathogen. You can take close-up pictures of the discolored leaves, reply to this question, and attach the pictures. That may help in identification. Look at the underside of the leaves for signs of any insect damage. Check the stems for signs of any boring insects. You can also cut through one of the branches to see what the woody stem looks like. Is it “green” and living or is it dry and dying? Here are common problems of viburnum. See especially verticillium wilt: https://apps.extension.umn.edu/garden/diagnose/plant/deciduous/viburnum/deadordyingbranches.html

Finally, if no further identification if the issue is possible, you may want to send a sample into the MSU Diagnostic lab for identification.

Here is the website for the MSU Diagnostic Laboratory including fee structures: https://www.canr.msu.edu/pestid/

Here is a website the suggests how best to take a sample: https://www.canr.msu.edu/pestid/submit-samples/

Hope this helps.