Courtyard Pottery in Solana Beach, owned and run by designer Tita Heimpel, is my absolute favorite resource for pottery in San Diego County. With a huge selection of glazed pottery ranging from huge imported planters to tiny hand-made tabletop treasures there is little that cannot be found at Courtyard, and if you don't see what you are looking for Tita will order it for you from one of her many suppliers.
Formerly located on Hwy 101 in Solana Beach, Courtyard Pottery has recently moved to a larger location almost directly across the train tracks to the Cedros Design District across from the Belly Up. After picking out your pottery you can head down the street to Cedros Gardens to pick out plants or over to the beach for a surf check!
Courtyard Pottery (858) 481-7687
http://www.courtyardpottery.com/ (under construction)