5 BB Kober or 5 BB Teleki is a V. berlandieri x V. riparia hybrid used as a rootstock. A vigorous rootstock, 5 BB is said to be the least reliable of the berlandieri x riparia hybrids, its quantity over quality aspect not always ideal, especially in cooler regions. In Bordeaux 5 BB was well suited to the compact, clay soils of the right bank in the 1960s during supply shortages of its V. berlandieri x V. riparia soul mate, SO4. It has good resistance to nematodes.

Other V. berlandieri x V. riparia rootstocks: 161-49 Couderc. | 420 A Millardet et de Grasset. | 5 C Teleki. | SO4 .

Bibliography

Dr Richard Smart in the Oxford Companion to Wine 4th edition ed. Jancis Robinson MW and Julia Harding MW (Oxford University Press, 2015, p.627.