Gardenia Flower Yellow Leaves. This symptom is known as interveinal chlorosis. How you can resolve them.
On the other hand using soft water is not advisable since it contains salts. 1 Nitrogen The deficiency of nitrogen results In very crippled wiry yellow plants or yellow leaves and often with pink stains. Also water runoffs from concrete being alkaline can affect nutrient uptake causing chlorosis and yellow leaves.
When a gardenia does not get the iron it needs its leaves generally turn pale green to yellow.
If your Gardenias leaves turn yellow and drop aside from the normal aging process of its leaves this may be caused by any of these reasons. How you can resolve them. An imbalance in the soil pH and nutrient levels can also cause yellow gardenia leaves. When a gardenia does not get the iron it needs its leaves generally turn pale green to yellow.