Variety traits
Vitis vinifera L.
Classification of grape varieties based on the duration of the growing season from bud burst to technical maturity of the berries, expressed in days and the sum of active temperatures.
In the reference 579 varieties crop Common grape vine, where this is mentioned in the description.
The grape ripening period is determined by the number of days from the start of bud burst to the onset of harvest maturity of the berries. To assess a variety's ability to ripen under specific climatic conditions, the sum of active temperatures (SAT) with a biological minimum of +10°C is used.
Varieties are divided into eight groups: from extra-early (up to 105 days, SAT 2000–2100°C) to very late (165 days or more, SAT from 3300°C). These indicators serve as a basis for selecting varieties for regional climates, planning agrotechnical measures, and determining the optimal harvest time.
To determine crop readiness, in addition to considering the varietal ripening period, analytical methods for monitoring sugar content, acidity, and pH are used, as well as visual assessment of skin color, seed condition, and the degree of lignification of the cluster rachis.
General information about the subject — on the page Maturity group.
Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.
Vitis vinifera L. · Common grape vine
Timothy P Sheehan, Sheehan Genetics LLC
Vitis vinifera L. · Common grape vine
LOMBARDI GENETICS (PTY) LTDA
Vitis vinifera L. · Common grape vine
David W. Cain, PhD.
Vitis vinifera L. · Common grape vine
David W. Cain, PhD.
Vitis vinifera L. · Common grape vine
MARANTO JOSEPH
Vitis vinifera L. · Common grape vine
Manuel Tornell and Juan Carre�o
Vitis vinifera L. · Common grape vine
SCHARCHAR KARNIEL
Vitis vinifera L. · Common grape vine
Terry A Bacon
Vitis vinifera L. · Common grape vine
Terry A. Bacon, Michael Streim.
Vitis vinifera L. · Common grape vine
Striem Michael
Vitis vinifera L. · Common grape vine
Grapeco Limited
Vitis vinifera L. · Common grape vine
Terry A. Bacon, Michael Streim.
Vitis vinifera L. · Common grape vine
Maranto Joseph|Bakersfield, CA, US
Vitis vinifera L. · Common grape vine
Walker Michael Andrew / Tenscher Alan C. / Riaz Summaira / Romero Ninfa
Vitis vinifera L. · Common grape vine
Shachar Karniel
Vitis vinifera L. · Common grape vine
Stargrow Cultivar Development Pty Ltd
Vitis vinifera L. · Common grape vine
The United States of America as represented by the Secretary of Agriculture
Vitis vinifera L. · Common grape vine
JUAN CARREÑO ESPIN
Vitis vinifera L. · Common grape vine
Shachar Karniel
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine
Vitis vinifera L. · Common grape vine
ARC INFRUITEC-NIETVOORBIJ