Very little. For golf greens, we recommend that you call us for routine maintenance every 12 to 18 months, which includes rolling the green to ensure a smooth putt, and inspecting the areas around the cups to make any necessary adjustments. In the meantime, all you need to do is use a leaf blower to remove debris and leaves. For other turf applications, just use your leaf blower and garden hose periodically to clear off debris and clean the surface.