Today, the states of California, Arizona and New Mexico represent 100 percent of the U.S. commercial pistachio production. California comprises 99% of the total with over 294,000 acres planted throughout 22 counties. There are 950 producers in the United States and the annual “farm gate value” of pistachios represents more than $1.6 billion to the California economy and more than $16 million to the states of Arizona and New Mexico. Harvest takes place anywhere from late August to early October. Between 5 and 7 years of age, the pistachio tree begins bearing fruit. A biennial bearer (a heavy crop one year and little crop the next), there appears to be no upper age limit to a tree’s viability.