Q.Gardenia turning yellow
My Gardenia are turning yellow on one side. What should I do?

Certified GKH Gardening Expert
Unfortunately yellow leaves are always hard to diagnose. It could be that your gardenia is getting too much water, but it could also be that it's getting too little. It could also be a nutrient deficiency. Take a look at this article and see which of these cases most closely matches your problem.
https://www.gardeningknowhow.com/edible/helping-a-gardenia-bush-with-yellow-leaves.htm