Xisca Nicolas wrote:I think only photos cn be clear enouogh!
Jordan Lowery wrote:Careful about changing the ground level near the trees. Too much added on top or taken away can damage or kill the trees.
If you take away, you damage roots.
If you bury part of the trunk, some trees (most?) will hate it.
But why should they die of having more earth to expand, if this does not affect the trunk?
Do you have a direct experience or a sure source about this?
Adding soil on top of a tree's root system results in extra weight and soil compaction, leading to root damage, leading to tree decline and possible tree death. I don't have a specific source, but as a landscape architect with years of experience dealing with arborists this is a well-known fact. You have to stay out of what is known as the tree protection zone.
I'd also add to the starter of this thread - you may already know this - that black walnut releases "toxins" into the soil that many other plants cannot tolerate. It's a competition mechanism. Just be sure the plants you want to add are either Juglans tolerant or far enough away from their roots to not be bothered by it.
