| What would be the cause of yellow spots on the leaves of several perennials e.g. Pincushion, Blue Mist shrub, et al Thank you! |
| The spots might be symptoms of insect feeding on the undersides of the leaves or they might be signs of a fungal disease. If only a few leaves are affected, just trim them off the plants. If lots of leaves are affected you may need to spray with a fungicide or insecticide. Good luck with your plants. |
