Gardenia Leaves Turn Yellow

Question

Gardenia bushes are healthy and bloom heavily. But some leaves (10%) turn yellow in spring through fall. Once winter arrives, all the leaves stay green. I spray for aphids and other insects every two weeks and apply fungicide alternating weeks. I try not to over water and the area drains well. Any ideas on what to try next?

Answer 1

Gardenias are notorious for yellow leaves and they are caused by many things. This article has a few suggestions on what could be causing them:
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/helping-a-gardenia-bush-with-yellow-leaves.htm