I'm hoping to get some benefit out of using VC tea myself. I've been spraying it directly on my garden. My problem is I will not know how effective it is because I'm doing the whole garden rather than just part of it to compare. But I will look for insect damage to see if I see little or alot.

I have a hardy hibiscus that for some reason attracts a little fly. The larvae turn the leaves into lace. One year I bought some chewing tobacco and brewed some nicotine poison. It did not seem to help as much as I thought Partially because I hated using the stuff and quit too soon. I hope to see VC tea work this year.