I have a small gardenia bush. Recently it started to bloom only the first bloom came out big and nice, then all the others came out smaller in size. I wonder what's missing? I'm fertilizing it as required. Could it be lack of that or too much of it?
Certified GKH Gardening Expert
Perhaps you could try giving it some additional phosphorus (either through a phosphorus-rich fertilizer or bone meal mixed in the soil). This nutrient is normally responsible for flowering and should encourage nice, healthy blooms.