Yorba Linda is an ideal place to grow orange trees. The city has the right climate (USDA Hardiness Zones 9a to 10b), sunny summers and mild winters, and the sandy loam that citrus loves. California is known for its orange production, with vast groves of sweet-smelling blossoms scenting the air each spring. There are some orange varieties that grow better in the Orange County area.
The Valencia is California's most important commercial cultivar. Native to China, the Valencia first appeared in California in the 1870s but was not propagated commercially until 1915. It is a smaller fruit, with a tight, thin rind. The flesh is juicy and rich in flavor and nearly seedless. According to the Purdue Extension, the Valencia "is the most satisfactory orange for the tropics, even though it may not develop full color in warm regions." It often will produce a second crop later in the season.
Trovita is a large vigorous tree that produces oranges mild in flavor and with few seeds. It was bred from the Washington Naval orange, which was imported from Brazil into the United States in 1873. Some of the Trovita variations include Dream and Summerfield. The variety Thompson was originally grown in California but was dropped because of poor quality, according to Purdue Extension.
Ambersweet is classified as an orange, though it is really a citrus hybrid of a clementine and mid-season orange. Gardeners like the Ambersweet because its bright orange fruit is nearly seedless, it peels very easily, it has an upright shape and it's a fairly vigorous grower. These conditions all make it an excellent "dooryard" citrus tree.