Frontier actively recruits and develops quality organic growers. For over a decade, they have been one of the largest buyers of organic herbs in the United States. They visit growers all over the world to observe and discuss the growing and harvesting of the herbs and spices bought. Over the years, they have built relationships with quality-conscious suppliers who consistently provide the best of a year"s crop and respect Frontier"s standards-including no irradiated products. Thorough inspection of a pre-shipment sample is performed on each product Frontier buys. Using their in-house lab as well as independent labs, they run tests for flavor, color, aroma, moisture, mesh size, volatile oil content, bacteria count, pesticides, and herbicides. Only 40% of the samples tested are approved and released for production.