Frost Washington Navel Orange Budwood

Citrus sinensis.

Frost Washington is the first, and currently much the most important, nucellar budline of the Washington navel. It was originated by H. B. Frost, the geneticist and breeder, at the University of California Citrus Research Center, Riverside, from a controlled cross made in 1916.  It was not released until 1952, however.  Since that time its popularity has increased until it is now more widely planted in California, Arizona, and Morocco than any other clonal selection of Washington. 

Rootstocks of accession:  Carrizo citrange, C-35 citrange.

Season of ripeness at Riverside, California:  December to January.

Prepared by the Givaudan Citrus Variety Collection at The University of California Riverside.