[Arid_gardener] Lady Banksia problem

[Bill Woody]

Our Lady Banksia vines are getting browner.  They are growing on trellises
on the east side of a concrete block wall so they are shaded after about 1
pm.  I have sprayed them with a dilute solution of baking soda and soap to
kill mildew and stop rust but they continue to decline.    Might they need
shading for a good portion of the morning as well in this fierce heat?  Or
what do you experts suggest?
 
Bill Woody

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