I would like to grow red and green table variety of grapes (preferrably seedless). Presently I know of three varieties of blue gapes that will grow here: concord, valiant and frontinac. They are not seedless. Though most of southern Alberta does not have a conducive climate for growing other varieties, there is a narrow area above the Montana border that is more temperate than the rest of the province. Can anyone recommend table grape varieties that may grow here?