All Things Gardening forum: Is this heat related or fungus on this shrub?

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Name: Sheridragonfly/Sheri
Alabama (Zone 8b)
Salvias Celebrating Gardening: 2015
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Sheridragonfly
Aug 11, 2015 11:17 AM CST
I have 3 butterfly bushes..One did the same a month ago in July and it was
HOT and humid.. not too much water...in the soil to cause it
It dropped its leaves they turned brown and fell off...

I cut it back to 15 inches and it is now putting on tiny green leaves on that
bush Miss Ruby

Miss Molly is turning yellow and leaves brown and dropping leaves and I know
it is not too dry or over watered...it has afternoon shade but half day sun
and enough moisture..the Miss molly beside it is green and doing good
green and not dropping leaves and not yellowing..

It has been 104 heat index here for a few weeks...
temp in the 96 -99 range...but they get shaded in afternoon ...not in the burning
sun all day

Do you know what I can do and what is causing this to happen..
Sheri
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Name: Jean
Prairieville, LA (Zone 9a)
Charter ATP Member Plant Identifier The WITWIT Badge Garden Sages Celebrating Gardening: 2015
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Moonhowl
Sep 5, 2015 11:59 AM CST
@sheridragonfly

Hi Sheri. I saw this post and wondered if you had figured out what was going on with your Buddleia. Looks like one of the leaf spot fungal infections. Have a look at this link.

http://www.gpnmag.com/fungicides-leaf-spot-diseases-ornament...

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