Romaine lettuce growing in a field, Salinas, California, USA

Aerial view of workers harvesting head lettuce in a field, Salinas, California, USA

High angle view of workers harvesting head lettuce in a field, Salinas, California, USA

Workers harvesting head lettuce in a field, Salinas, California, USA

High angle view of fields of cauliflower and lettuce, Salinas, California, USA

Workers harvesting lettuce in a field, Salinas, California, USA

High angle view of vegetable greenhouses, Salinas, California, USA

Pistachio trees growing in an orchard, California, USA

High angle view of workers working in a field, Salinas, California, USA

Workers harvesting in a cauliflower field, Salinas, California, USA

Wildflowers on a landscape, Anza Borrego Desert State Park, California, USA

California Golden Poppy (Eschscholzia californica) flowers in a field, Marion County, Oregon, USA

Flowers in a field, Marion County, Oregon, USA

Close-up of California Golden Poppy (Eschscholzia californica) flowers, Marion County, Oregon, USA

Balsam Root (Balsamorhiza sagittata) flowers in a field, Columbia Hills State Park, Columbia River Gorge National Scenic Area, Washington State, USA

Head lettuce growing in a field, Salinas, California, USA