Our 42-day program to get rid of nematodes in turf calls for three applications of PROMAX™ Organic Nematacide plus one application of ZAP® Soil Restorer. The PROMAX™ will kill nearly all nematodes in your soil up to 12″ deep and the ZAP® encourages the beneficial microbes that are left in the soil to thrive and crowd out new nematodes that might otherwise develop.