Q.Why Is My Cordyline Turning Yellow
Just wondering why my Cordaline is turning yellow at the bottom, it is quite a windy position.
Certified GKH Gardening Expert
Unfortunately, your photo did not come through. I am unable to see the damage. If it is turning yellow at the bottom of the stalk, where it meets the soil, then I am likely to suspect root rot.
This will occur when the soil doesn't have a chance to dry out some between watering.
I am unable to see if it is salvageable, but you can try a fungicide.
Here are some articles that will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/houseplants/ti-plant/cordyline-plant-varieties.htm