Is urban farming for commercial purposes legal in Ontario?

Asking because we grow hot peppers for our hot sauce company on 4 small unban farm plots across the city of Windsor. We don't use any pesticides or herbicides and our plants and peppers are premium quality. (Compared to wholesalers and retail around here its night and day.) Someone mentioned this might not be legal but we can't find anything that says otherwise. Any help would be much appreciated!