Hmm ... I've never written about "fruit nursery tour of San Diego"!
I'll second Harvey's comment about Exotica. The owner Steve Spangler has introduced many new plants to fruit growers in the U.S. He is also a kind person and very knowledgable concerning fruiting plants. His nursery is eclectic and worth viewing (like a trip to the zoo) but many plants are mislabeled and some are of questionable health. A few blocks away is Clausen's Nursery -- an excellent place to buy plants. I would call ahead for availability. Another place to call is Green Thumb in San Marcos, CA (in San Diego county). They have a limited, but highly varied selection. City Farmers nursery is east of downtown and has possibly been picked over by now, but it is worth visiting anyway. There are several nurseries named Anderson, Andersen, etc. The world famous Walter Andersen nurseries have two locations: one near "old town" San Diego and the other in Poway -- about a 25 minute drive from downtown in moderate traffic. The Poway location is much larger (5 acres) and the full-time staff (not the part-time) is very knowledgeable. You'll have to call Ong's for an appointment. You can get the number from Jon (
pitangadiego) -- and it would be criminal not to visit him. If you do go into the "northern" part of the county to Poway, etc. you are certainly welcome to stop by here. I'll be out Saturday morning at a Citrus Pest Management seminar at the Encinitas Library.