Winegrowers Supplies - Vine variety information
Sirius (originally known as Gf. Ga-51-27)
Father: Villard Blanc (Seyve Villard 12-375)
A white Piwi/disease-resistant variety.
Year of breeding: 1964
Country of origin: Germany
Breeder/License holder: Bundesforschungsanstalt für Rebenzüchtung Geilweilerhof, Siebeldingen/Rheinpfalz
Number of clones: 0
Year of entry into the German Federal Office's Varieties Register: 1995
Area planted in Germany in : hectares
Area planted in England: unknown
- colour: yellow-green
- bouquet: a pleasant fruity aroma
- palate: strong, fruity, similar to Riesling
photo by Julius Kühn-Institut (JKI), Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof - 76833 Siebeldingen, Germany.
Time of bud-burst: early to middle, hence can be susceptible to late Spring frost.
Strength of growth: strong
Growth of side-shoots: very low
Flowering strength: very high
- size: medium
- shape: three-lobed and slightly curved
- colour: bronze, spotted young leaves are hairy like a cobweb
- surface undulation:
- petiolar sinus: open lyre
- size: large, 'shouldered'
- density: loose
- size: large
- shape: round
- skin colour: greenish-yellow
Time of veraison: middle to middle-early
Time of harvest: needs to ripen well, so needs a good site
Grape yield: very high, reliable
Wood ripening: good
Winter hardiness: very good
- Oidium: medium-high
- Peronospora: very high
- Botrytis: high
- Roter Brenner:
- Stem-atrophy: sometimes less than average
Suitable rootstocks: SO4 or 5BB
Normal stem height:
Normal row spacing: 1.8 to 2.0m
Vine spacing in the row:
Winter Pruning: eyes/buds per sq. metre of land occupied by the plant.
Advantages: Very high yield.
Disadvantages: A good site is necessary.