I wouldn't bother, only because their "all natural" stuff couldn't be any different from their chemical stuff in terms of the fact that you're paying someone who cares far less than you do about your lawn, to spread stuff that if you were to buy yourself would cost mere pennies on the dollar for what you pay them to do a less efficient job.

I do my own lawn & when I mow, first, I do it more often than once a week and it includes mowing, using a string trimmer, an edger & finally blowing the clippings off the walk & driveway. That takes me about an hour.

When I fertilize my lawn, it only takes me about 15 minutes. Far far less time than what I spend on the frequent maintenance.

Up in MT I'm guessing you have a cool season grass type & what we're talking about is maybe 3 or 4 applications per year of a fertilizer.

If you were to just buy some plain old protein based feed grains from a feed store you'd save buckets of cash & be pleasantly satisfied with the results.

My 2 cents

Good day, Dan

I wouldn't be surprised if it were something short acting (blood meal) or low potency (chicken litter, alfalfa meal) that would still allow them to swing by once a month to hand you a bill. Of course, it would have to be their own special formulation.