I’ve never had much problems other than gnats indoors. Yellow sticky traps and better watering fixed it. Basically I had one plant that didn’t drink as much as the rest but I waterd it with them. They initially came from a bag of soil, but I gave them a nice home to breed. I always keep a bottle of green cleaner incase anything ever happens. I’ve heard mites are no joke and I Wana be ready for them.
Outdoor on the other hand I always have mega problems. This year was OK untill i stopped spraying. I sprayed every week with green clean until little buds formed. Like a dummy I thought I’d be ok because hey, haven’t seen any bugs right? That stuff couldn’t work that well psssh.. well ot worked extremely well and about a week after aphids came. Took about another week to get lady bugs. Been releasing them since. 
