That is why I said it depends on the tree, not all trees have deep roots, some have shallow roots. I'm not an expert either, but have some experience due my own issues with tress going over in storms. Every couple years I have to have my local city horticulturist come out to inspect a very large eucalyptus tree because they are known to have shallow roots (neighbors get worried it'll fall over).
So if we knew what type of tree that was we could say if it potentially had the capability of deep roots, or if its known to have shallow roots. And then from there we can determine if other factors like dry weather could lead to shallower roots than normal for that species of tree.
I see. It just seems counterintuitive for any large tree to intrinsically have shallow roots. Feels like the only reason that should happen would be due to it being sick or the environment. Most of these trees aren’t native to So Cal right?
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