The origin of the Cortese vine, which in the Custoza area is known as Bianca Fernanda, is not certain: it is believed to derive from the provinces of Alessandria, Novara and the Tortona area and is known in Piedmont since the 18th century also with the dialectal terms Corteis, Courteisa and Courteis.
- Tip of the bud: medium, fluffy, whitish green colour;
- Leaf: medium, pentagonal with five-seven lobes, often asymmetric; lyre-shaped petiole breast, closed with overlapping edges; upper page smooth, glabrous, dark green, with light green ribs, lower page arachnoid; pronounced teeth, with a wide base with a concave and a convex side;
- Grape bunch: medium-large, pyramidal, winged, sparse conical; visible peduncle, semi-woody up to the first bifurcation;
- Grape: medium-large, ellipsoidal, not very pruinose, thin golden yellow when exposed to the sun.
Phenological and productive characteristics
All the phenological phases are located in the middle part of the year: sprouting in the second ten days of April, flowering between the first and second of June, veraison in the second ten days of August and harvest by the end of September. It is a vine with a high vigour, with a rapid growth of the shoots and a luxuriant vegetation.