Snap Beans Phaseolus vulgaris. One-half of California's snap beans are grown in the San Joaquin Valley. Spinach Spinacia oleracea. Originating in China, it is believed the Moors introduced spinach to Europe when conquering there. It was first cultivated in the United States around 1806.
Spinach is grown in the cooler regions of California.
Sweet Potatoes Ipomoea Batatas. Native to the tropics of America. After discovering the new world, sweet potatoes were taken to Europe. All of California's sweet potatoes are grown in the San Joaquin Valley. Tomatoes Lycopersicon esculentum.