ICL Sierraform® GT Spring Start 16:0:13.3 +1 Fe 1.5 Si & TE 20kgSpring Start has iron and manganese to boost photosynthesis and colour, and low levels of MU to help your turf start getting greener even when its still cool. The formulation also contains slow release potassium, as well as standard release nitrogen and potassium. Key features: Ideal as the first fertilizer of the season. Promotes healthy growth, plus better color and photosynthesis. Phosphate free to help manage phosphor build up. Technology: Slow