La Tortilla Factory is closing its plant in north Santa Rosa at the end of March. The plant near Charles M. Schulz-Sonoma County Airport has been producing packaged Mexican foods like tortillas and spices for nearly five decades. Most operations will be relocated to a plant near Wichita, Kansas. La Tortilla Factory is owned by Idaho-based Flagship Food Group, which acquired a majority stake in the company a little more than three years ago.