Ernst Berg wrote in a message to Dennis Mummert:
 EB> From what I've read Pot cannot tolerate high amounts of Aluminum in
 EB> the soil. I'm sure that the reason is because it needs very little
 EB> and too much is a problem.
I have never seen aluminum being a concern as a nutrient for plants of
any kind.  Where would supplemental aluminum come from so that plants
could be affected by it?
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