Montgomery insect stuff has always worked for me. Ive added it as both a water additive as well as a foliage spray. Dont buy through Amazon but that was the quickest image I could find at work. Also, when used, be sure to flush/discontinue use 2wks before planed harvest.
You should purchase the following two insecticides. They will prevent spider mites and fungus gnats, the #1 and #2 pests of indoor gardeners. They are both made from fermented bacteria, meaning they are extremely safe for Human consumption. It’s also considered organic. Wait for a good watering to saturate the coir until runoff. Do not spray or apply to leaves. I use the Monterey during vegetation to prevent mites and anything that crawls at half strength once a week. Upon flowering I switch to Microbe Lift Mosquito to prevent fungus gnats. Gnats will eat the fungus on the coir, until the fungus is gone, then eat your cannabis roots severely weakening or even killing your plants. https://www.amazon.com/Monterey-Insect-Spray-Spinosad-Pint/dp/B00FH4CYB2/ref=pd_lpo_86_img_0/137-2345140-8940931?_encoding=UTF8&pd_rd_i=B00FH4CYB2&pd_rd_r=3b116886-08c2-41e9-ba3b-bd2ae6c93171&pd_rd_w=fzgyT&pd_rd_wg=WZMBF&pf_rd_...