Meetings are on the second Monday of the month from 6 to 8:30 PM in the Surfside Race Place at the Del Mar Fairgrounds. Meetings are free for SDHS members and $15 for non-members. Parking is free.

Upcoming Meetings

    • Mon, August 10, 2015
    • 6:00 PM - 8:30 PM
    • Surfside Race Place at the Del Mar Fairgrounds

    Rollin Coville

    The Ecology of California Garden Bees

    We welcome entomologist Rollin Coville, who is an important part of the UC Berkeley Urban Bee Lab, where he is the Lead Photographer. Most people are now aware of honey bees and their troubles, but are you aware that California has  approximately 1600 other species of bees? These other bees are often ignored, but are important pollinators. They are critical in maintaining our natural plant communities and are capable of supplementing the pollination services honey bees perform in agriculture. These other bees are also under threat, and gardens can serve as a valuable resource for them. Dr.Coville’s presentation is going to look at the amazing diversity of these other bees. He will explore some of their stories, including their classification, nesting habits, and floral preferences. In addition, he will look at some of their natural enemies, insects that mimic their appearance, and what gardeners can do to help their populations.

    Dr. Coville received his Ph.D. in 1978 in entomology from the University of California, Berkeley. For over 30 years his primary interest has been photographing insects and spiders. He also has an interest in the biology and behavior of Hymenoptera and has published papers on Trypoxylon wasps and Centris bees. After his retirement in 2006 from AT&T, he began working with Dr. Gordon Frankie from Berkeley and Dr. Robbin Thorp from Davis in their ongoing studies of bees in urban gardens. The recently published book, California Bees & Blooms: A guide for gardeners and Naturalists, is one result of their work. He is continuing his photographic work in documenting the behavior and ecology of bees in California as well as Costa Rica. 

    Copies of the book will be available for sale.

    For more information see,

    The presentation starts at 6:45

    Members free 
    Guests $15
    Parking free for everyone

    • Mon, September 14, 2015
    • 6:00 PM - 8:30 PM
    • Surfside Race Place at the Del Mar Fairgrounds

    Rebecca Sweet 

    Refresh Your Garden Design - Simple Strategies to Wake a Weary Garden

    We welcome Rebecca Sweet, author and garden designer with her company, Harmony in the Garden, located in Los Altos, California. A lifelong gardener, her artistic eye and creative flair translate her design ideas into unique and engaging spaces that delight the senses year-round. 

    With all of the buzzwords and trends in gardening these days, how do you know where to begin?  Based on her new book, Refresh Your Garden Design with Color, Texture and Form, Rebecca Sweet takes a fresh approach to explain and simplify traditional design concepts for home gardeners of all levels.  You will learn how to break down traditional garden design principles into practical, easy-to-understand and, more importantly, easy-to-implement solutions. Inspirational photographs highlight and reinforce real-life situations, helping you not only to identify what has gone wrong with your garden, but how to fix the problem.  

    Rebecca Sweet’s gardens have been featured in Sunset, Fine Gardening, Horticulture, Woman’s Day and Country Living magazines as well as many regional publications. Rebecca and her gardens have also been featured on the critically acclaimed PBS series, Growing a Greener World. She has been a radio guest on numerous programs, including Martha Stewart Living. In addition to designing gardens, she is the author of Refresh Your Garden Design with Color, Texture and Form (an Amazon Top 10 Garden Book 2013 selection) and is the co-author of the national best-selling garden book, Garden Up! Smart Vertical Gardening for Small and Large Spaces.  Rebecca also shares her secrets to successful garden design in her column “Harmony in the Garden” in Horticulture Magazine. In her lighthearted blog, Gossip in the Garden, Rebecca shares inside information about garden design, gardening tips, amusing observations and how-to videos for both the novice and experienced gardener.

    A book signing will follow the meeting, where Rebecca will have her books available for sale. 

    The presentation starts at 6:45

    Members free 
    Guests $15
    Parking free for everyone

    • Mon, October 12, 2015
    • 6:00 PM - 8:30 PM
    • Surfside Race Place at the Del Mar Fairgrounds

    Nan Sterman

    Hot Colors, Dry Garden

    Nan launches her latest book Hot Colors, Dry Garden and tells us about adding bright colors to our gardens.

    Check back for more information.  Program subject to change. 

    The presentation starts at 6:45

    Members free 
    Guests $15
    Parking free for everyone

    • Mon, November 09, 2015
    • 5:00 PM - 8:00 PM
    • Surfside Race Place at the Del Mar Fairgrounds

    Designer Panel

    Trends in Garden Design

    A panel of Landscape Designers will present information about current trends of garden design in Southern California.  This is usually one of our most popular meetings.  You won't want to miss it!

    Check back for more information.  Program subject to change. 

    The presentation starts at 6:45

    Members free 
    Guests $15
    Parking free for everyone

    • Members FREE 
    • Guests FREE with preregistration guest pass or $5 at the door.  Guest registrations accepted starting October 1st. 
    • Parking FREE for everyone

    • Mon, December 14, 2015
    • 6:00 PM - 8:30 PM
    • Surfside Race Place at the Del Mar Fairgrounds

    Clayton Tschudy

    Waterwise Lessons from the Garden

    Clayton Tschudy, director of horticulture at the Water Conservation Garden on Ecology Landscaping and other Waterwise Lessons from the Garden

    Check back for more information

    The presentation starts at 6:45

    Members free 
    Guests $15
    Parking free for everyone

Past Meetings

Mon, July 13, 2015 July - Rush to Restios
Mon, June 08, 2015 June - Night at the Fair
Mon, May 11, 2015 May - Palms for San Diego
Mon, April 13, 2015 April - Jon Rebman
Mon, March 09, 2015 March- Eucalyptus: The Good, The Bad and The Ugly
Mon, February 09, 2015 February- Plants with Benefits
Mon, January 12, 2015 January - Under the Spell of Succulents
Mon, December 08, 2014 December - Centennial Celebrations: Remembering and Commemorating the 1915 Panama-California Exposition
Mon, November 10, 2014 November - Holiday Marketplace
Mon, October 13, 2014 October - Lawn Gone: Landscape Designer Panel
Mon, September 08, 2014 September - Randy Baldwin of San Marcos Growers
Mon, August 11, 2014 August Meeting - Creating Paradise Wherever You Live
Mon, July 14, 2014 July Meeting - Scent-sational Plumeria
Mon, June 09, 2014 June Meeting - Night at the Fair
Mon, May 12, 2014 May Meeting - Stuck on You! Indoor and Outdoor Projects with Succulents
Mon, April 14, 2014 April Meeting - Oaks of San Diego County
Mon, March 10, 2014 March Meeting - Tried and True or Brand New: Citrus in Today’s Gardens
Mon, February 10, 2014 February Meeting - The Wild World of Succulents
Mon, January 13, 2014 January Meeting - Native Plants of Chile
Mon, December 09, 2013 December Meeting - The Drunken Botanist
Mon, November 11, 2013 November Meeting - Holiday Marketplace
Mon, October 14, 2013 October Meeting - Trends in Contemporary Landscape Design
Mon, September 09, 2013 September Meeting - Right Plant for the Right Place
Mon, August 12, 2013 August Meeting - Drip is Hip
Mon, July 08, 2013 July Meeting - Succulents Simplified
Mon, June 24, 2013 June Meeting - Night at the Fair
Mon, May 13, 2013 May Meeting - Seriously Funny - The Business of Plants
Mon, April 08, 2013 April Meeting - Writing the Book on Natives
Mon, March 11, 2013 March Meeting - Growing on Air: Amazing Tillandsias
Mon, February 11, 2013 February Meeting - The Future of Roses in Today's Gardens
Mon, January 14, 2013 January Meeting - Exotic Bulbs for Southern California
Mon, December 10, 2012 December Meeting - Bring me Slow Flowers
Mon, November 12, 2012 November Meeting - The Edible Front Yard - Special Meeting!
Mon, October 08, 2012 October Meeting - A Californian's Guide to the Trees among Us
Mon, September 10, 2012 September Meeting - Welcome to Club Med
Mon, August 13, 2012 August Meeting - The Revolutionary Yardscape
Mon, July 09, 2012 July Meeting - Not Just for Show
Mon, June 11, 2012 June Meeting - Night at the Fair
Mon, May 14, 2012 May Meeting - Small is the New Big
Mon, April 09, 2012 April Meeting - Fitting CA Native Plants in CA-style Gardens
Mon, March 12, 2012 March Meeting - From Seed to Skillet
Mon, February 13, 2012 February Meeting - Trees of Ill Repute
Mon, January 09, 2012 January Meeting - A Rollicking Trip into the World of Cactus and Succulents

 Our Mission

Promote the enjoyment, art, knowledge and public awareness of horticulture in the San Diego area, while providing the opportunity for education and research


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