Help Identifying Issue

L

lmorse

Hi,
 
I am struggling to identify what is going on with my plants. Are you able to identify the issue from these pictures and recommend the best course of action? 
 
My plants are in a pot, outside. We live in Australia so the temperature is between 31-40 degrees C.
 
I have occasionally been using the following, 'GoGo juice', magnesium to fertilise\enrich, and 'EcoOil' and mancozeb in case of thrips, spider mite and aphids.
 
Thanks for any advice.
 
Lee
 

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A couple of great images, thank you.
 
I guess it looks like either 1) Magnesium deficiency, or 2) Manganese deficiency?
 
Another possibility is that there is something wrong with the soil that is preventing nutrient uptake by the roots.
 
A common problem is a high pH, which will inhibit the roots.
 
You may have plenty of Magnesium or Manganese in your soil, but the plant just isn't absorbing it.
 
With those kind of temps, if you can plant in soil, that's always #1 option.  If you can't, then get a pot that's insulated.  Or bigger.
 
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