English/Persian walnuts have a fairly high chill requirement and can suffer from poor bud break and reduced yields in years with marginal or low chill accumulation. Katherine Jarvis-Shean (UCCE Yolo, Solano, and Sacramento Counties) has been looking at the efficacy of rest-breaking agents, both in semi-controlled conditions and in commercial orchards. She shares how well they work, their effect on yields, budbreak, and walnut quality, and the surprising interaction of chill accumulation with rest-breaking efficacy. To find out more about Katherine’s research, you can read more here or listen to a previous episode here.

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Thank you to the Almond, Pistachio, Prune, and Walnut Boards of California for their kind donations. Thank you to Muriel Gordon for the music.