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Pistachio Tree Rootstocks

Platinum (USPP# 14,706 P3)

An advanced and patented clonal selection of P. integerrima x P. atlantica. Selected for superior vigor, salt tolerance and cold tolerance. Otherwise similar to UCB-1 in most traits. Planted widely over the last 7-10 years. Platinum™ is the only pistachio rootstock never associated with “Bushy Top” Syndrome!

UCB-1 Rootstock

UCB-1 is the short name for University of California Berkeley #1 hybrid pistachio rootstock, invented by Dr. Lee Ashworth of the UCB Department of Plant Pathology. It is a hybrid of pistacia atlantica x P. integerrima. Both parents are homozygous and produce hybrid seedlings with a minimum of variability. 


UCB-1 is a superior hybrid for its disease resistance, salt and cold tolerance and vigor. One of the most popular rootstocks for new pistachio plantings, typically planted in spring and field budded 3-4 months later or planted in summer or fall and field budded the following spring.

We offer UCB-1 as both clonal and seeded plants:

  • UCB-1 Clonal
    A clonal selection of UCB-1, lab produced by tissue culture, which is currently the most widely planted and most tested clone of UCB-1 in the industry. Preferred by growers seeking all the advantages of UCB-1 together with clonal uniformity.


  • UCB-1 Seeded
    All of our seeded UCB-1 is starts with seed grown in our own on-site certified hybrid UCB-1 orchard. We follow the exact same protocols as UC Davis Foundation Plant Services UCB-1 Hybrid Orchard. Special hand-pollination procedures are required to produce this seed because the parents do not bloom simultaneously. The greenhouse protection of the seed source trees and the hand-pollination methods all but eliminate any unwanted hybridization from other pollen sources. Our quality seed germinates well and results in uniform plants with very low variability.

Quality Orchard Trees Since 1951

Sierra Gold Nurseries

5320 Garden Highway, Yuba City, CA 95991 Main (530) 674-1145

TOLL FREE (800) 243-4653 

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