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Name: Jason Nasby
Scobey, Montana (Zone 3b)
Aug 2, 2016 8:52 PM CST
We have had a wetter than normal spring/summer and it is now August and the leaves are turning black on the north most bushes. I think the bushes are about 25 yrs old
Thumb of 2016-08-03/visitor/34b3c5
Thumb of 2016-08-03/visitor/fe464f

Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
Garden Sages Plant Identifier
Aug 2, 2016 9:00 PM CST
Hi Jason, Welcome! to NGA,

Your plants have powdery mildew. Its caused by the wet weather - not much you can do. Maybe spray them with a fungacide.
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and proclaiming...."WOW What a Ride!!" -Mark Frost

Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Aug 3, 2016 4:00 AM CST
Welcome! caraganas are prone to powdery mildew as Daisy noted but since your leaves are turning black I'm wondering if they have sooty mold, especially since it has been wet (powdery mildew likes dry weather).. Is there a tree overhanging these plants and which might have a insect pests such as aphids?

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