Jai_Ganesha,
Yes, Costa Farms does sell to retailers in Canada, as well as the US and Puerto Rico. While the company's biggest customers are big-box retailers, Costa Farms also does business with a wide variety of independent garden centers and grocery stores.
If you've not seen the medium we use for our mainline cacti and succulents (the one that's coir + bark + sand), I'd encourage you to check it out before passing judgement about it. I'll completely understand, if after experiencing it for yourself, you find it not to your liking. But it's nothing like what our Apopka growers use for the houseplants in their greenhouses. (As you can imagine, it HAS to be different in a greenhouse vs. outdoors in hot, humid Miami with its regular afternoon thunderstorms.)
You are correct --- my role at Costa Farms does not have me potting plants (neither in Miami, nor Apopka).
Rather, I do the company website, social media, and other initiatives geared to home gardeners.
Thanks! I hope this helps. And feel free to shoot any questions to me about Costa Farms or the plants. It's why I'm here.
---Justin
Costa Farms Horticulturist