Nuts

Event

Almond Variety Field Day

May 8 2025

View 22 new and experimental almond varieties from UC Davis, USDA, Burchell Nursery, Spain, and Australia, growing side by side in this 3rd leaf commercial orchard of Yorizane, the new self-fertile almond variety from USDA. All but two test varieties are self-fertile. Experimental varieties are being…
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The buds shown on the walnut branches are male flowers called catkins
Article

UC scientists ask walnut trees: When do you need to be irrigated?

April 16th, 2025
By Trina Kleist
UC scientists are working with growers in Tehama, Butte, Lake, Amador, Contra Costa, Stanislaus and Yolo counties to test a new way of measuring the irrigation needs of walnut trees. Shackel and team think this new method will allow growers to use less water by not irrigating early in the season, and trees…
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Rod Stiefvater speaks at a Department of Plant Sciences seminar
Article

Gift extends UC Davis pistachio research on new scions, rootstocks

March 6th, 2025
By Emily C. Dooley
The University of California, Davis, is enhancing and expanding its Pistachio Breeding Program after a generous gift from philanthropist and pistachio farmer Rod Stiefvater, who is donating more than $335,000 over three years to develop new rootstocks that thrive under changing climate conditions.
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Almond

When to plant: January–early February Harvest window: August–October, depending on variety Fertilization: Nitrogen in spring, additional applications based on tree age, health, and soil quality Prune in early winter (December–January)
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