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July 2026
Monthly Meeting
NEXT GENERAL MEETING: Saving Rare Plants - Advanced Horticulture on the California Islands, With Kevin Alison, July 18, In-Person, Oasis, Rancho Bernardo, 1:30p -3:30p
Kevin Alison The islands of California are biological hotspots for uniquely rare and endangered species. But, what do you do if traditional methods of propagation fail or are unreliable? This presentation will cover advanced horticultural techniques to overcome challenges and prevent extinction. Kevin Alison serves as the Native Plant Manager for Catalina Island, where he leverages his expertise in conservation, restoration, and horticulture to prevent extinction. Kevin s
Jul 1
Articles
TREES, PLEASE: Bristlecones Older Than Methuselah (So How Old Are Your Trees?)
By Robin Rivet. Have you ever pondered what it would be like to live for 1000 years? What about 4000, or even 5000 years? There are such...
Oct 1, 2017
TREES, PLEASE: Tree Pruning Standards
By Tim Clancy. The American National Standards Institute (ANSI) is the keeper of standards for all sorts of products and services. These...
Sep 1, 2017
TREES, PLEASE: Pomegranates—More Than Wonderful!
By Robin Rivet. Revered for their sweet-tart taste, healthful anti-oxidants, and characteristic crimson juice, the allure of a...
Aug 1, 2017
TREES, PLEASE: Wilt, Anyone?
By Tim Clancy. My first arboricultural encounter with lethal disease killing a tree from the inside was about 25 years ago. The tree, a...
Jul 1, 2017
TREES, PLEASE: Jacarandas: Lovely Lavender or Purple Panic?
By Robin Rivet. Final exams and Southern California’s rainy season are over, but in June the jacaranda tree (Jacaranda mimosifolia) is...
Jun 1, 2017
TREES, PLEASE: Queen Palms, Part II: Pests and Diseases
A mystery affliction causes queen palms’ otherwise healthy fronds to collapse. By Tim Clancy. In a recent article, we discussed the nutritional needs of queen palms ( Syagrus romanzoffianum ) and the importance of proper pruning and having a proactive fertilization plan to help keep the palms looking healthy and growing vigorously. Now we’ll focus on one of the reasons queen palms are so commonly planted, which is that they are relatively pest and disease free. Despite que
May 1, 2017
TREES, PLEASE: A Shady Business: Citizens Need to Speak Up
By Robin Rivet. Do you avoid parking under a tree because you’re concerned that bird or insect feces might ruin your car wash? Although...
Apr 1, 2017
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