What is the best way to get my Gardenia plant to bloom and keep away the ants?

I've had my Gardenia in a large pot for about 4 months now and it just now bloomed 1 flower! Also, there is ants making a colony in the soil. Will ant killer harm the plant? Also, any good suggestions for making the plant healthier?


Thanks!What is the best way to get my Gardenia plant to bloom and keep away the ants?
It needs more sun if it is not blooming.





Also gardenias usually bloom once a year. All the blooms open at the same time.





Ant killer will not hurt the plant.