Vinca Flower Leaves Turning Yellow. Jul 18 2020 Symptoms of Rhizoctonia root rot on Vinca Plants first start yellowing and then collapse as the fungus destroys the internal structure. An alkaline soil with a pH above 60 may cause the leaves to turn yellow.
Theyve grown and are flowering somewhat but leaves are turning yellow. Potassium deficiency shows itself when leaf edges turn bright yellow but the inner leaf stays green. Several types of rot may affect a vinca causing its leaves to yellow and even fall off the plant.
There are basic reasons with which the leaves of your Vinca plant change their col.
The plant blooms with bluish-purple lavender or white flowers and has elliptical glossy foliage. Aug 26 2019 Causes of Yellowing Vinca Plant. Many have experienced your dilemma. Jul 16 2013 3 Answers.