Black spots on Penstemons
I have 4 penstemons in one bed and all of them are infected with black spots. What causes this?
Submitted by BHGPhotoContest


Thanks for writing. Penstemons will sometimes fall under attack from fungal diseases, and that sounds like what may be happening with yours. Making sure your plants don't stay too wet, are planted in an appropriate spot, that the foliage remains as dry as possible, and there's good air flow can help reduce the instance of disease.

---Justin, Senior Garden Editor,

Answered by BHGgardenEditors