Niban Granular Bait is labeled for use in flower gardens, but not in vegetable gardens.
Your question and concerns are valid. Niban Granular Bait is our most popular bait though because it is so safe. The 95% other ingredients are just food products, which is the part of the bait that attracts the insects. The 5% boric acid is the only part of the bait that kills the insect. Many pest control companies use Niban Bait as part of their natural pest control program because it is such a safe and easy to use product.