Author Archives: Luke Milliron

Photos from the Field: Walnut Orchards Not Leafing Out

From the northern San Joaquin Valley to the northern Sacramento Valley, walnut growers are reporting a widespread and alarming issue of walnut trees not leafing out this spring. The initial hypothesis from researchers is that we are seeing frost damage from mid-November, however the symptoms on mature blocks are both more unusual and more severe than autumn freeze events in recent memory. Continue reading

July Leaf Sampling: A Critical Task in Prune Production

As the bulk of your prune fertility program for the season comes to an end, it’s time to get the report card on how you did. Published July critical values established for prune by UC researchers can help guide you in your fertilization practice. Leaf analysis results help keep an orchard between excess and deficiency, which means the most efficient use of your fertilizer dollar. Continue reading