About Us TreeSource is a full service commercial citrus nursery that serves theCalifornia citrus industry and greenhouse growers around the world. TreeSource is the first place to call for all of your citrus needs. Citrus nurseries are facing increased regulations due to the spread of disease vectoring insects and citrus diseases such as Citrus Greening (HLB). We are committed to supplying trees to our customers that are grown in the latest insect resistant structures in order to meet or exceed the standards of these new regulations. Using technologies learned from around the world, TreeSource is one of the most progressive citrus nurseries in California. We offer growers and wholesale nurserymen options they may not find elsewhere. History TreeSource is owned by Griffith Bros, who also own Griffith Farms and Suntreat Packers and Shippers. Griffith Farms has raised their own container grown citrus since 1987 and during those years built 30,000 square feet of greenhouses to supply their tree needs. TreeSource was formed in 1999 and expanded the operation to include field nursery trees (Ball and Burlap) that yields more than 150,000 trees per year, a citrus liner operation, and nearly 3 acres of insect excluding structures for seedling, tree, and liner production.