This is one of three rootstocks ('Bitters', 'Carpenter', and 'Furr') originally hybridized at the USDA US Date and Citrus Station in Indio, California, and developed further by the University of California, Riverside. ‘Furr’ produces medium to large trees, with good yield. Young trees on this rootstock showed good tolerance to freezing. Fruit quality of late navels was good and granulation was no worse than fruit on ‘Carrizo’ or ‘C-35’. It is tolerant to CTV, very tolerant to P. parasitica, very tolerant of citrus nematode, and moderately tolerant of calcareous soil.