Most miticides like Forbid 4F Ornamental Insecticide Miticide have a residual of about 7-10 days so you should wait that long before applying the Koppert Swirski-Mite Plus (Amblyesius swirskii).
The Koppert Swirski-Mite Plus are labeled for use in and on greenhouses, field salad and ornamental crops. We would recommend contacting the manufacturer directly at +1 416 291 0040 for more information on if this product can be used on marijuana.
We can only ship within the US.
The Koppert Swirski-Mite-Plus have 250 predatory mites per sachet, per the manufacturer.
Koppert Swirski-Mite Plus (Amblyesius swirskii) states on our product page that it is only labeled to control Young larvae of various thrips species and eggs and larvae of whiteflies (both Trialeurodes vaporariorum and Bemisa tabaci). We cannot confirm nor recommend it for anything off label such as spider mites.