Why Does My Vincas Keep Dying. According to the Alabama Agricultural Experiment Station and Clemson University Extension there are several diseases and fungus that can cause vincas to wilt including phytophthora stem blight and root rot pythium root rot rhizoctonia stem and root rot gray mold and the tomato spotted wilt virus. Vincas survive droughts well but dont like wet soil so give them a home in loamy or sandy soil that drains well.
And vinca are prone to at least three wet-soil-related fungal diseases phytophthora. Water from rain or sprinklers splashes spores from the fungus up onto the plants where it grows and quickly kills the entire plant often in as little as 48 hours. Jul 16 2008 Vincas or periwinkles can be infected with a fungal disease called aerial phytophthora.
The disease spreads when the fungal spores in the soil are splashed on the plants when you water or when it.
Two related perennials are greater periwinkle Vinca major and lesser periwinkle Vinca. Try to keep as much dirt with them as you can. Caused by various types of fungal infections yellowing vinca plants are one of the first symptoms of the overall decline in health of your vinca planting. Jan 28 2020 Thereof why are my vincas dying.