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Just an FYI, filled in raised beds around the trunk of you oak will eventually kill it. Takes many years for symptoms to manifest
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That's a very interesting footnote.
Has anyone else observed this phenomenon ?
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Yes, this is true.
Increasing the soil level around established oak trees often results in their demise. This has been demonstrated for many decades here in CA.
Usually Oak Root Fungus is the culprit, and yes, it can take years for them to die from infection. Increased irrigation speeds the process.
Older native oaks are especially susceptible.
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No worries, the Live Oak tree does not have stone built around it, it’s an optical illusion . The raised beds contain only roses and perennials. The tree sits by itself in the middle of the yard level to the ground with only light edging around it.
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