Black spots on dianthus
I bought 3 pots of dianthus on clearance at a home improvement store because they had been exposed to frost. They came out of that to be beautiful flowers. Now they have small black spots pn they leaves that cause the leaves to die off. I live in zone 5 and the are still in the orginal pots. They get the morning sun until afternoon. What can I do to help them? Thanks.
Submitted by BHGPhotoContest

Hi,

Thanks for writing. It sounds as though your dianthus have a fungal disease, but without being able to examine the plants, I can't be sure of what the disease is.

You can try spraying them with a fungicide (either traditional or organic) and see if that stops the fungus from spreading any farther.

Also: Be sure there's good airflow around your geraniums, let the potting mix dry between waterings, and don't water your plants after about 2.00 p.m.

Do the plants seem as though they could be rootbound? If so, that may also be encouraging the fungal disease.

---Justin, Senior Garden Editor, BHG.com

Answered by BHGgardenEditors