These three ingredients can help make a big difference in your testosterone levels.
Most gardenia blossoms are white, cream or ivory. Gardenias (Gardenia spp.) are fragrant southern plants native to China and Hawaii. The blossoms can be single or double, and petal shapes range from long and thin to full and round.
Yellow leaves on your gardenia could be caused by a couple of different things. It sounds like you've got the water thing under control; gardenias should be kept evenly moist but not soggy or standing in water. Raise the humidity around your plant if you can. Next, I'd recommend fertilizing with a water-soluble fertilizer mixed at half strength every two weeks.