The guys who do my lawn (and shovel my snow) are American.
However, I must confess the guys who do the heavy landscaping, tree trimming, etc. on our lot are all Salvadorans. Their boss is a wonderful guy -- completely legal, married, two lovely kids -- who works his ass off to realize the American dream. He has a full time job with the company that does brush and tree trimming for the local utility, and on the side, nights and weekends, he runs his own landscaping company. I have no idea how many of the guys who work for him are legal or illegal, but they are doggone hard workers.
Even just a few years ago around here all the landscaping jobs were done by high school and college kids now all those jobs are taken by immigrants . Now what do they do for summer work? Not much left for them. I hate that LINE that Bush is spouting about Immigrants doing work Americans don't want to do, THAT IS ABSOLUTE B.S.
The HS kids who are looking to earn a few bucks work for the lawn guy. The Salvadorans work a hell of a lot harder. I did a lot of grass cutting and snow shoveling as a kid (thank God I now don't have to do it), but I never worked as hard as these guys work.
Have you checked to verify that he has a local business license?