I would wait untill the pods turn brown and begin to split, the set them aside somewhere to dry out,, it will take a least a couple of weeks then open and let the
seeds dry out,, and waaaaalaaaaaaa more
seeds for next year!! You being in canada will have to start them again next year from
seed, They aren't hardy there,, you can try to bring it in and over winter it inside I've never tried that it would be interesting to see if it can be done,,,,,, please keep us updated if you decide to bring it in, * I take it you have it in a pot already??? * if you dig up from the ground the roots are probably well spread out,***** A note for next year,, If you cut the pods off after blooming,, it will bring more blooms from other branches
,,, I normally don't start saving pods until the end of the blooming season,