For an all year round effective fertilizer then this product from Bonide is a popular choice among cannabis growers. Containing paraffinic oil, this pest control spray will get rid of common pests that like your cannabis plants such as aphids, whiteflies and mealy bugs. As well as a pest killer it can also be used as a preventative spray to keep unwelcome guests away.
This concentrate will go a long way as you just need 1 to 2 ounces of this stuff per gallon of water. Also, if you make up too much it will keep for a couple of months and still be as effective. This clever pest controller works by smothering the insects that it interacts with and can kill them at any stage of their life cycle. So for an all seasons and all harvest, fertilizer this spray is a great choice.