Its worth a shot. Lord knows none of the lawn care companies I've used in the past have done much for my yard. The Fun Cheap or Free Queen: GREEN Lawn Care for CHEAP! The secret of using sugar on your lawn.
20 Insanely Clever Gardening Tips and Ideas (with pictures!) - Epsom salts in the soil for tomatoes and peppers. Add a Tablespoon or so in the soil when first planting and then sprinkle more into the soil when mature.