On Thu, 05 Nov 2009 16:26:50 +0000, Jonno wrote:


Wouldn't you be doing that if you watered the garden and the roots are
located under the garden?

I said before, if you dump soil above casuarina roots, then they grow up
into it much more voraciously than gum trees do. Makes a bit of a mockery
of no-dig gardens as you have to dig a patch to give seedlings a starting
edge.

If the roots stayed below, then they would be just picking up the excess,
which is no problem.

The other problem is that the tree leaves a rain (less) shadow.