Grass plants require nutrients to promote healthy growth. When The Turf Doctor laid your lawn, an initial application of fertiliser was added.This has provided the nutrients to give the young grass seedlings a healthy start. Once your lawn is established, you should continue to apply fertiliser on a regular basis. Regular applications of fertiliser containing nitrogen(N), potasium(K), iron(Fe) and phosphorus(P) will ensure healthy grass plants and a top quality lawn. We would recommend a high quality slow release fertiliser. If your grass turns a "yellow-green" and lacks vigour - it is nitrogen deficient and needs fertilising. The nitrogen will generate lush green leaves and a shorter stronger root system. Phosphorus and Potasium facilitate energy storage and helps regulate respiration. They will help the plant grow and resist desease. Iron helps to control moss and weeds. The Turf Doctor stocks only the best quality products which are specifically produced to suit New Zealand conditions.(see our product supply section)