Why Are There Yellow Leaves on my Gardenia Bush?
What is causing the leaves on my gardenia bush to turn yellow? It is getting plenty of water and is on our screened patio getting the morning sun. It is blooming, but not much. Some leaves are dark green, but some are turning yellow and dying.
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. Look for a fertilizer with iron chelete, because gardenias can be prone to chlorosis. Chlorosis causes a yellowing of the leaves, especially between the veins.