Ask a Question forum: Shrubs - what's happened to my shrubs and magnolias ?

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Name: Carol Texas
Central Texas (Zone 8b)
"Not all who wander are lost."
Region: Texas Fruit Growers Bookworm Dragonflies Composter Greenhouse
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Ecscuba
Aug 8, 2017 1:46 PM CST
A couple weeks before we left on vacation, we noticed a lot of our shrubs had that white powdery mildew on them -so we spray treated them -- all except the magnolia - they didn't have any signs of it. We returned after 4 weeks and several of our shrubs and 3 magnolias have a lot of dead leaves -- never had this before (magnolias are a few years old, as are the shrubs). There is currently no sign of powdery mildew or disease of any kind on any of the shrubs/trees. Any ideas on what this could be and what I should do to save them?

They are all on an an automatic watering system 2 x per week.
Thumb of 2017-08-08/Ecscuba/f15800


Thumb of 2017-08-08/Ecscuba/1fc78d

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My passion is painting but gardening is running a close second.
Name: Daisy I
Reno, Nv (Zone 6b)
Not all who wander are lost
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DaisyI
Aug 8, 2017 5:30 PM CST
You were gone for a really long time - was there a heat wave well you were gone? Did you have someone checking your yard while you were gone? On the shrub (photo #1), are the leaves brown on the house side?

I noticed that the Magnolia has new green growth above the dead leaves. That leads me to believe you had a couple really hot days that fried your plants but they are recovering.
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

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Name: Carol Texas
Central Texas (Zone 8b)
"Not all who wander are lost."
Region: Texas Fruit Growers Bookworm Dragonflies Composter Greenhouse
Cactus and Succulents Organic Gardener Hummingbirder Herbs Garden Art Gardens in Buckets
Image
Ecscuba
Aug 8, 2017 6:17 PM CST
@Daisyl it does get hot in July - well into the 100 or 102 degrees. But it always does - and we always have the watering system at 2 times per week for specified length of time - nothing changed there. And the system is properly set and functioning. We had someone watching the house too. So it's weird. The leaves are dead all around the magnolias and that one shrub -- not just on the house side. We have an acre - and probably 50+ shrubs/smallish trees (in addition to a lot of live oaks and elms). It's just the magnolias and that one shrub I've been growing for 2 years that have had something happen to them. At first I thought maybe the powdery mildew spray I used might be a problem -- but I didn't spray the magnolias with it.
Whatever it is I'm hoping it's all done and the leaves will come back. Just wanted to see if anyone was familiar with something like this.
Www.carolmedfordart.com
My passion is painting but gardening is running a close second.

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