Knowing what I know and have seen from other people's mistakes, I would be concerned about someone spraying around ornamentals. She is rightfully concerned about the misuse of RoundUp and other products that can be harmful to shrubs. Think Green gave you some good products to use. I use Reward around ornamentals. My favored weed preventers include Ronstar FLO and Sureguard in addition to the ones he named. Know the plants you are treating around and what kind of weeds you are trying to control.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738