Cultivar Information

Flower type = Self-fertile
Berry color = Black
Year introduced = 1986
Variety protection = Patent expired


'Ison' was releasedby Ison's Nursery in 1986. Plant patent #5822, Dec. 9, 1986. The listed pedigree is 'Sugar Gate' x 'Senoia'.


'Ison' has been used with moderate success by commercial growers in south Georgia. We only have a single vine of this cultivar, and therefore have only limited data. Because of its medium/large size and productivity, it has been used as a combination juice/fresh market cultivar. Flavor seems to be good as long as crop load matches the vine canopy, but some years the crop load is excessive. Dr. John Clark at the University of Arkansas noted that 'Ison' was extremely susceptible to cold damage. We only recommend trial plantings of 'Ison' in south Georgia.

Cultivar Attributes in Tifton, GA Trials

Cultivar Vine vigor Leaf disease Berry rot % Full crop Harvest period Ripening % Dry scar
Ison     none 120 % late even 50%
Fry medium slight slight 70% midseason even 30%
Supreme medium slight none 90% midseason uneven 60%