I also live in Ontario and there is some plants we have up north and the neighbour has a tree with lots of bad insects for cannabis so what I have being doing is spray once a week with a mix of of neem oil with organic soap compound to Aid the mix between the oil and the water and this has been very efficient no bugs no issues and the plants are thriving right now.
Hope this tip help you out.
Have a happy grow.
Yeah. Dont grow celery lol Thanks for the advice. I will be trying that if the lady bugs dont workout right away. I'm hoping that the lady bugs travel to the other plants. Lots of people in my neighborhood are growing. Happy growing to you as well.