Ongoing research

Blog by Paula PashbyI love the winter season, and I always know that winter is upon us when I start seeing the beautiful Poinsettias, Euphorbia pulcherrima, everywhere.  They are hard to miss, with their vibrant red, white, and pink specialized leaves. I buy a Poinsettia every year and place it as…

California’s climate is a citrus grower’s dream, but beyond the familiar oranges, lemons, and limes lies a fascinating world of lesser-known citrus. Many of these fruits have deep cultural roots, unique flavors, and surprising uses — from culinary delights to ornamental beauty. Here are some of the most…

 During my time as the Horticulture Advisor for UC Cooperative Extension (UCCE) in Stanislaus County (1978-2011), I frequently received questions from gardeners asking what to do about neglected and/or overgrown deciduous (trees that lose their leaves each year) fruit trees such as peach, plum, and…

A series of winter seminars hosted by the UC Davis Department of Entomology and Nematology will be available in person and online.

 Can't think of a gift to buy for the beekeepers, food enthusiasts, naturalists, environmental educators, and honey and mead lovers in your life? It gets a little sticky, doesn't it? Sometimes really sticky.To the rescue...a couple of Santa's helpers...The California Master Beekeeper Program (CAMBP…

Happy Holidays! As the year winds down, we would like to wish you Happy Holidays and thank you for your support and interest in the UC Master Gardeners of Humboldt and Del Norte Counties. We are excited to share that, beginning in February 2026, we will offer a series of monthly presentations on the 3rd…

This column is written by the Master Gardeners of Yolo County each month. It provides answers to selected questions recently asked by Yolo County gardeners. Question: My five-year-old grapefruit has yellowing leaves. It has not bloomed. I water it every day. What should I do? Answer: A five-year…

This column is written by the Master Gardeners of Yolo County each month. It provides answers to selected questions recently asked by Yolo County gardeners.. Question: What fungal diseases are commonly seen in fruit trees in the Sacramento Valley? What treatments do you recommend?Answer: Fruit trees in…

The California Plant and Soil Conference will be held on February 3-4 at the Visalia Convention Center 303 E. Acequia, Visalia, CA 93291The conference is organized by the California Chapter of the American Society of Agronomy (CA ASA). Registration is now open through the conference website (https://na…