As I’ve discussed previously (here), coast redwoods in many areas are showing symptoms of dieback, typically beginning towards the top and progressing downward. Drought and disease have been implicated in the redwood decline, but the true cause remains elusive. I suspect the decline is ultimately related to the altered fire ecology.
In October 2016 I applied fire mimicry treatments to a grove of coast redwoods in Alamo, CA that were in decline. Here are the results after two years.
Sudden Oak Life 
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