So why are your gardenialeaves turning yellow?
The yellowing leaves could be warning you of poor plant health.
Gardenia Growing Needs
Failure to satisfy the growing needs of gardenias can cause yellow leaves.
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They also have preferences for soil, including:
What Causes Gardenia Leaves to Turn Yellow?
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Yellow leaves on your gardenias do not always indicate a problem.
Come spring, it’s normal to see some yellow leaves.
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This is simply part of the process of older foliage dying off to make way for new leaves.
Send a soil sample to your local county extension and have them test it for iron deficiencies.
The extension may recommend a solution.
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Usually, the soil will need to be amended to lower the pH.
You will notice soft, mushy brown roots where there should be dry white or tan roots.
This is especially prevalent in older gardenia plants.
This is why it’s important to know what kind of soil pH your plant needs.
To prevent drainage problems, work a lot of organic matter into the soil.
Be careful to follow program instructions closely.
Used coffee grounds are more of a nitrogen source rather than an acid source in the garden.
Gardenias grow best when located in a partially shaded location.
Gardenias.University of Florida Extension.
Gardenia Diseases and Other Problems.Clemson Home and Garden Information Center
