Large Red Geraniums Have Suddenly Started Wilting Shriveling And Falling Over

Question From: Sedona, Arizona, United States
Q: I 'had' 6 very large red geraniums that I raised from small nursery plants and over wintered in my greenhouse for 4 years, these plants were 3'-4' across. This was a very unusually hot summer and all of a sudden the stems of these gorgeous, healthy looking plants started wilting and shriveling and falling over?? Is this fungus or insects or what? Is the soil contaminated and not useable from these pots? I have one pots with 2 spindly stems with 1 leaf left!

A: Sounds like a fungal disease. I would replace the soil and clean the pots with a bleach solution of 1 part bleach to 9 parts water. Dispose of the final plant in the garbage. Best And Happy Yardening, Nancy