. >> the fires that burned through california's wine country destroyed most of the crop, eric pearsonsted. no, not grapes, but marijuana. >> this was a 40,000 square foot barn. about an achor in size. >> not just a barn. procession in there. >> processing, packaging. >> aroma is great. >> last month pearson began picking a bumper crop. first harvest since it became legal in california. >> long days of hard work. very exciting. >> ceo of spack, running medical marijuana dispensaries since 2009, had hoped to capture some of the $5 billion expected spent annually on legal marijuana in california. last month we toured the sonoma facility where marijuana was processed prepared for retail sale. cases of marijuana were stacked along the wall. but then, wine country went up in flames. >> if it wasn't metal it is not here. >> many marijuana plants survived, damaged by smoke and ash, they lose much of their value in the retail market. how much did you lose? >> couldn't tell you exactly at this point. a lot. >> a lot. >> a lot. >> he is not alone. there are at least 3,000 marijuana farming opera