Jupiter seedless blue grape, from the University of Arkansas breeding program! Jupiter Seedless Table Grape is one of the finest flavored grapes for fresh eating with a slight muscat flavor and delicious crunchy texture. Grapes are non-slipskin and very early ripening. The Jupiter grape is an interspecific seedless Muscat grape developed at the University of Arkansas in 1998. It is a cross of Arkansas 1258 x Arkansas 1762. The Muscat flavor comes from “Gold” ( vitis vinifera) variety; the seedlessness comes from “Reliance” ( vitis labrusca) variety. Zones 5-8 from Pense Berry Farm.