RS-9
ActiveVitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
10 August 2026
The variety is a low-vigor rootstock resistant to phylloxera. Genetically, it is a hybrid of Vitis riparia (form Tomenteux) and Vitis rupestris (form Martin).
The rootstock is recommended for cultivation on warm sandy and loamy soils not prone to excessive dryness or moisture. It has low to medium tolerance to chlorosis, and low compatibility is noted when grafting with a number of grape varieties. Its use may influence the fruit yield and the ripening time of the scion.
1 jurisdiction
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ 1035324
Records are sourced from official registry publications. Data sources and legal status
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Same species
Vitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
Vitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
Vitis L. · Grapevine
David W.Cain
Vitis L. · Grapevine
INCONNU (FR)
Vitis L. · Grapevine
Vitis L. · Grapevine
Nearby in the species list 196-17 Castel, 196-17 Cl, 216-3 Cl, 23410 Seyve-Villard, 23657 Seyve-Villard, 244 Landot, 261-50 Couderc, 26205 Joannès Seyve, 26205 Joannès Seyve, 31 RICHTER, 3309 Couderc, 333 Ecole de Montpellier, 333 ESCUELA DE MONTPELLIER, 34 EM, 4010 Cl, 41 B Millardet et de Grasset, 41 B MILLARDET GRASSET, 420 A Millardet et de Grasset, 420 MILLARDET GRASSET, 44-53 M