JOS GEL 6-5-30 is rich in potassium and is recommended as a supplement for crops with high potassium requirements during the fruit-filling stage; it enhances fruit size and sugar accumulation. JOS GEL 6-5-30 promotes ripening and aids colour change in certain fruits. It is specially formulated for foliar application, although it also shows good results when applied to the roots. JOS GEL 6-5-30 promotes ripening and aids colour change in certain fruits. It is specially formulated for foliar application, although it also shows good results when applied to the roots. JOS GEL 6-5-30 promotes ripening and aids colour change in certain fruits. It is specially formulated for foliar application, although it also shows good results when applied to the roots.