Vitis labrusca x vinifera 'St. Theresa Seedless' Prohibited to OR, ID and NY. A very hardy, mostly seedless, purple grape for Northern growers, from Elmer Swenson's Wisconsin breeding program. This purple slipskin grape is loaded with large clusters of sweet, flavorful fruit that ripens in early September. The vigorous vine tolerates alkaline soils. Grows in USDA Zone 4-8. A grapevine can be both a highly productive source of fruit and a focal point of considerable beauty. Think carefully about where to plant one to provide shade, cover a wall or accentuate an arch. We offer grapes most of which will ripen even in areas with cool summers. The ripening dates listed are for the cooler parts of Western Washington, but most ripen sooner and thrive where summers are warmer. Click here to read our Grape Growing Guide
