In the decades since, we have made a number of improvements to our second generation formulations. In 2009, we renewed the range again, adding a new potassium formulation and increasing the level of microelements. We have also improved the encapsulation technology. The base material is Osmocote-grade natural vegetable resin, but a special process makes Osmocote Pro exceptionally resistant to the 'popcorn' phenomenon often associated with second generation products. Such products quickly lose their nutrient delivery characteristics and, although they perform satisfactorily in the laboratory when constantly wetted, often cause unexpected salt build-up in cultivation. Osmocote Pro has been field tested in all conventional growing areas and climatic conditions before it was released in stores. Features: - second generation, controlled release fertilizer - safe throughout the entire duration of action - reformulated envelope - all essential micronutrients within the envelope - 3-4, 5-6, 8-9 and 12-14 month durations of action - high nitrogen and high potassium types - standard particle size (1.8-4.0 mm) Use: - for growing cost-sensitive crops - for soil mixes containing organic matter, garden soil - for lower dose applications, e.g. dosages vary according to the duration of effect and the nutrient requirements of the crop.In principle, it is recommended to dispense in the same quantities as for the use of 'Osmocote Exact standard'.