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soil mixing

Why is an amended soil sometimes bad? Roots are adapted to the 
soil they are in So if there is large difference between the garden 
soil  and your amendement/ the soil in the pot, the roots are not fit 
for your garden soil They dont make new roots because they 
already have roots but of the wrong kind!.  I would suggest amend 
the soil but use a fifty fifty mix of the garden soil and your amended 
soil.  I once had a small sedum plant with roots from the wild. It 
refused to grow Then I made a cutting from the same plant without 
any roots and off it went.
Ben J.M.Zonneveld
Clusius lab pobox 9505
2300 RA Leiden
The Netherlands
Fax: 31-71-5274999
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