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Search Our KnowledgebaseDouble A Vineyards is a family owned operation dedicated to supplying you with high quality grapevines, along with berry plants, figs trees and juice for wine making. We began production in 1990 with a small number of grapevine cuttings; since then, we have grown to over two million. We have also increased our grapevine variety list to over 150, with production of other varieties by request. Beyond offering a robust plant selection, we are also committed to treating our customers how we’d want to be treated – like family.
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Rick Dunst, Viticulturist, Double A Vineyards, Inc. Winter injury caused by low winter temperatures is an important limiting factor to grape production in many regions the United States. Our Grapevine Characteristics Chart lists grape varieties by their winter hardiness according to USDA hardiness zone. Hardiness is determined by using a number of sources, including university publications, …
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There are many factors that influence whether or not a specific grape selection will survive and be capable of producing high quality fruit at a certain location, including winter hardiness, length of growing season, and risk of spring frost. A common measure of the growing season is Growing Degree Days (GDD). Grapevine development during the …
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Rick Dunst, Viticulturist, Double A Vineyards, Inc. Selecting the proper rootstock for your vineyard is just as important as variety selection. Rootstocks are used to induce or reduce scion vigor or to overcome specific soil limitations caused by physical factors such as soil pH and high salt content, or biological factors such as phylloxera, nematodes, …
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Rick Dunst, Viticulturist, Double A Vineyards, Inc. Now that harvest is over and winter is approaching, the staff at Double A Vineyards is starting to get a lot of phone calls and e-mails from our customers asking for assistance in selecting appropriate varieties to grow on their sites. While many of our customers …
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