Bio insecticide for outdoor growing

I would not use anything unless there is an actual problem. In my experience, insects never seem to be a real problem when growing outdoors, apart from the odd caterpillar occasionally. By the way, in my country it is illegal to use any sort of neem product on anything intended for human consumption. The "homestead and chill" website has many recipes for natural/biodynamic home made sprays tailored for use on cannabis. Hope this helps,.......... Organoman.