Years ago some Occultist doing some witchcraft ceremony poisoned a historic oak down in Texas.
The people immediatly took cuttings to preserve the lineage of the tree and horticulturalists worked hard to try to save the tree. I don’t know if they were successful.
They were. It was 1989, the "Texas Treaty" tree; two-thirds of it died, but it apparently survived by removing all of the soil and power-washing the roots, along with injections of something to stop the poisoning. I read about this just this morning at Expert: Toomer’s trees may stand a chance, but the article has suddenly switched to subscription-only.
Winter-time dormancy means there may be hope for the Toomer's trees, too. War Eagle!