If one had the notion to plant a tree on a (sorta) mound....

Mike Corazzi

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or even just higher soil than the rim of a shallow pot, would it be a good idea to wall up or "dam" the edges of the soil with denser soil like garden mix or adobe or whatnot to create a barrier to keep the soil from washing over the edge of the pot? Tapering the wall of course to not make it a straight, ugly hoop of dirt.

Talking about an inch or so to contain the "real" soil you will use.
????
 

Jeremy

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If you're using an inorganic mix, garden soil will work its way down into your mix. Try using drain mesh as a wall. Moss also works a treat.
 

Eric Group

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or even just higher soil than the rim of a shallow pot, would it be a good idea to wall up or "dam" the edges of the soil with denser soil like garden mix or adobe or whatnot to create a barrier to keep the soil from washing over the edge of the pot? Tapering the wall of course to not make it a straight, ugly hoop of dirt.

Talking about an inch or so to contain the "real" soil you will use.
????
Layering different sizes and types of soil is not a good idea, walling a mounded tree with different soil piled around the edges just won't work- it will simply wash away... you could make some sort of "wall" out of plastic mesh if absolutely necessary is sort of an option but it will look awful... just pot the tree in the right sized pot and don't mound it very much...
 

0soyoung

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You could literally muck it up.

Muck, as you should recall, is a mix of clay (and/or akadama fines - IIRC you have some of this crap ;)) and sphagnum, is used for slab plantings. Of course, one normally covers the muck with green moss to make it all pretty.
 
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