Fungus in Impatients

I live in Michigan and have planted impatients in a particular bed for the last 15 years. In July the impatients have begone to wilt and drop their leaves. I know it must be a fungus, but what is causing it? Is it in the soil and would removing the soil solve the issue? I really want to continue to plant impatients in this bed. I do have a sprinkling system hit this bed daily. Am I watering too much? The bed faces east so it only gets the morning and early afternoon sun. Please help!
Submitted by BHGPhotoContest

Hi,

Thanks for writing. Without being able to see your impatiens last year, it's tough to know for sure what the problem is.

Some fungal diseases will remain in the soil; others tend not to survive your area's winters and need to be introduced anew each year.

That said, especially wet, humid conditions encourage many fungal diseases --- so if you water your impatiens daily, that may be making potential disease issues worse. If you can cut back on the amount of water that area gets, it should help.

Also, do you add compost to the planting bed? If not, I'd definitely try that, as well. Compost will help the area drain better, so it doesn't stay wet (in case rot was an issue last year). It will also help introduce beneficial microorganisms to the soil that may help your plants resist disease better.

I hope this helps. Good luck! 

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


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