Five years ago I began fire mimicry treatments on several coast live oaks in Aptos, CA. Last week I checked on them and here are the results. Most of the oaks have responded well, although a few are not showing improvement. I’m planning to add more biochar in the next round of treatments.
Sudden Oak Life by Lee Klinger 
Nice work! Not to mention important work! It will be interesting to see whether and how much additional bio-char will help. Thanks for sharing your research here.