My daughter has an annual & perennial garden that runs the length of her back yard - about 125/150 feet. The neighbor uses a Lawn Service - Weed Man, to enhance the grass & control so called, weeds. They have zero shrubs, bushes, trees or plants in their yard. My daughter wants to expand the garden to include produce. She is concerned the sprayed chemicals used by the lawn service may be toxic for both the plants & humans, especially the produce. (Plus her dog.) I called the lawn service & inquired about the chemicals but was not given a concrete answer as to if the chemicals were toxic. There is a chain link fence dividing the yards & the chemical solution is sprayed up to the property line defined by the fence. Thoughts, suggestions, facts?