Ants don't dig Neem oil, doesn't hurt plants. Works for Aphids and the like too. Mix 2 tbls w/ gallon of water, plus a teas. of mild dishsoap or a emusifier(wet betty etc). Shake well before and during sparying. I have pet birds on my back patio, and the ants love their water and dropping of food and crap. I spray the tray and around the cage, ants gone next day. Work the same for plants, outside and in. They also won't cross a line of baking soda I hear. Terro ant killer works good too. Ants suck up necter, take back to nest. All gone in 3 days. Instant grits work good too. Ant carry single grain back to nest, eat grits, grits expand in stomach, ant dies of exploding tummy. Cream of wheat does the same. Your milelage may vary....steve aka koolkat