One of San Diego’s greatest gardening resources is the Master Gardener Association of San Diego County. Under the umbrella of the University of California, Master Gardeners are a diverse group of people from all over the county who were accepted into the MG program for training and have completed six months of instruction and labs. Beside all of that, they are lifelong learners and love to share their knowledge with the public. Personally, I tell people that now that I’m a Master Gardener I know how much I don’t know but I have great resources to find out!
Check out their website which is packed with a ton of useful information: https://www.mastergardenersd.org/