RS-9
ActiveVitis L. · Grapevine
UNIVERSITY OF CALIFORNIA KEARNEY AGRICULTURAL CENTER
10 August 2026
The variety is a hybrid (known as "Hybrid 53-7") obtained from crossing "Rusensko Edro" × "Ruby Seedless". The ripening period is 150–160 days. It belongs to the second class of seedlessness with the presence of small rudiments; it accumulates sugar up to 20–23 Brix.
The vigor of the bushes is high. Berries weighing from 4.9 to 7 g are covered with a firm edible skin. The variety has good transportability and is suitable for fresh consumption and drying. The recommended vine pruning length is 6–8 buds.
Resistance to downy mildew is increased, to powdery mildew is low, and to grey mold is relative. Winter hardiness is at the level of -19…-21 °C, while the variety demonstrates the ability to recover after frost damage.
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.
№ Zornitsa*BG 2
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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
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Nearby in the species list Zlarinka, Zlatarica, Zlatarica Blatska, Zöld szagos, Zöld szilváni, Zöld veltelini, Zöld veltelini 133, Zöld veltelini Kt.14, Zolotistyj Rannij, Zora, Zoumiatico, Zoumiatiko B, Zunek durelo, Zweigelt, Zweigelt E.11, Zweigelt N., Zweigelt Szőlő, Zweigeltrebe