3-4 sulfur burns will have you mite free. I had the same thing.......I used to check all my plants for spider mites and other pests and didn't see anything. Low and behold a clone from someone had hemp russet mites. They are much smaller than everything else so I didn't even know what to look for. I was horrified when I found then on my plants and I was even more horrified that I had given them to
@bobrown14 . Everywhere I read, all I heard was ditch everything, burn everything, start over......its impossible to get rid of them. I even burned a few plants that were just covered in them because I was paranoid (now I would just do the burns and have 100% confidence that I will be free from pests in a month)
Then I found some resources from outdoor greenhouse growers regarding sulfur burns and hemp russet mites. They had tried everything I was trying with no luck. Then they did the burns. Suddenly I had hope. They were also using SNS 209 who happens to be a sponsor here. I was lucky to have received a big ass jug of it from the POTY win so I started watering that in on top of the sulfur burns. Its basically rosemary oil which when watered into the soil, becomes part of your plants systemic defense. The rosemary oil causes internal issues on any pests that eat your shit and inhibits their reproductive capacity. So the dual approach seemed to work for all the commercial cannabis greenhouse growers....why not give it a try. I am SO SO SO SO SO glad I did.
I wish I had a greenhouse where I could do burns on my outdoor girls. If I get a greenhouse, I can promise you I will invest in one or two more burners and I will make it a part of my outdoor routine as well. I won't stop doing burns.....even when I know I am pest free. Its like a bullet proof vest for growing.....I know as long as I keep doing them, I won't have to worry about spider mites, hemp russet mites, leaf hoppers, or PM.
I currently do my burns through mid to late flower (stop around day 50 of flower) and haven't had it impact the product in the slightest. I haven't had anyone comment on any scent or taste stemming from the burns.