Gardenia Plants
Q.

yellow gardenia leaves

Zone 32571 | Anonymous added on March 27, 2018 | Answered

My soil ph is 5.5, which should be suitable for gardenias. Always having a problem with yellow leaves. I fertilized them this spring and treated them with liquid iron, but still have yellow leaves. Any suggestions? Thanks, Mike Davis

A.
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Downtoearthdigs
Certified GKH Gardening Expert
Answered on March 28, 2018

It sounds like you are feeding your gardenias well, so it's probably something else. Watering problems can cause a gardenia's leaves to turn yellow. Overwatering or poor drainage in the soil could be the culprit. Or, you might not be watering enough during dry conditions.
https://www.gardeningknowhow.com/edible/helping-a-gardenia-bush-with-yellow-leaves.htm

Root rot can cause yellowing leaves. This is caused by fungi, but is made worse by overwatering or poor drainage:
http://www.clemson.edu/extension/hgic/pests/plant_pests/shrubs/hgic2058.html

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