Vinca, aka periwinkle, is a super popular plant during Louisiana summers. The flower is everywhere you look and for good reason. The flower looks fantastic in Louisiana landscapes. It does well in hot weather and in drier conditions. Unfortunately wet weather and cool temperatures become the perfect environment for Phytophthora blight, the vinca killer. This disease is always present in the soil, but can affect vinca when conditions favor it for too long. It spreads easily by rain splashing onto neighboring vinca, causing crown and root rot. It can wipe out an entire planting in no time.
Here are some best practices for planting vinca: