Gardenia flowers are indeed fragrant and beautiful and the plant itself is gorgeous (when healthy). I have a single gardenia in the landscape and it is about 3 1/2' tall. I have to spay it with insecticidal soap 2-3x each year, keep it well-watered, and fertilize it 2x each year, with iron added. Without the additional iron, the leaves always turn yellow. I tried to dose it with Mg for that yellowing, but nothing but soluble iron seemed to work.
