Corsage Gardenia

Question

I received a Corsage Gardenia plant I ordered online. It was in beautiful condition, I potted in good rich soil, watered with a little liquid iron and plant food and also sprayed it with insecticidal soap. All of a sudden the lower area developed some yellow black spotted leaves which I removed.
Now new leaves are popping out where the leaves I removed were.
None of the upper leaves were affected.
I know it is a ground bush but not in my area in Illinois, it potted and will be indoors come Fall.
Thanks John Styler
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Answer 1

Gardenia are a very finicky plant and will let you know if it's not in the perfect growing conditions. (and that's not easy!)

Transplant stress is a common reason for yellowing leaves.

You may want to leave the plant in a container and you can more easily control the conditions. Digging up the plant in the fall to winter over will again cause a root disruption.
These articles will help you with care of your new plant.

https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-plant.htm
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/transplanting-gardenia-plants-planting-gardenia-somewhere-new.htm
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/gardenia-winter-care-tips.htm
https://www.gardeningknowhow.com/ornamental/flowers/gardenia/growing-gardenias-indoors.htm