Have a Blue Prince and a Blue Princess holly. They are very sparse and sickly looking, especially the princess. In the past they have not been like this. What can I do to improve their health? They have very few leaves and are yellowish in color. They had very few berries this winter.
Sick Holly Bushes
Certified GKH Gardening Expert
I would suspect possibly chlorosis. This article will help: https://www.gardeningknowhow.com/ornamental/shrubs/holly/holly-yellow-leaves.htm Regardless, I would fertilize and also treat the plant with a fungicide, as these two things will help fix many of the other possible causes for the unhealthy plants.