Before hard freeze. Make it more manageable to cover. Plus, it will be this big again by late spring early summer. I'd definitely give all of it away if people wanted. I've already had a few neighbors ask me about it.
Look deep into nature, and then you will understand everything better.
Oh my god, your Brugmansia is beautiful, would you be willing to send a couple seed pods to someone in Canada for postage fees? Or a seed swap perhaps?
The only insect problem that I usually have with it is spider mites. Occasionally hungry caterpillars. I rotate between floramite sc and minx miticides whenever applicable. Does the trick and lasts for a couple months.
Look deep into nature, and then you will understand everything better.