Almond Growth in ID The US has been the largest producer of almonds for a long time, it produces about 80% of the world's supply of almonds. As you read before, most almonds in the United States are produced in California. Where in California? California is the only place in North America where almonds are grown commercially. In the past 30 years, California's almond yield has quadrupled. More than 450,000 acres in the lush San Joaquin and Sacramento valleys are under almond cultivation, stretching 400 miles between Bakersfield and Red Bluff, California. University of Idaho Ag research project bears fruit…Researcher Essie Fallahi has proof that Almonds can grow in Idaho.