Unable to find any beneficial nemotodes locally, I've ordered them online the past few years. Was I ever excited to find them at Veranda's Nursery in Port Isabel yesterday! They are 10 days old and safely stored in their refrigerator. In the Valley, we should apply to the lawn in Fall and Spring. There are lots of people out there better informed about them than I am, so for more information, just google "beneficial nemotodes". All I know is that when I make an early spring application, we have less flea, tick and fire ant problems.