Over many decades, we have come to count on colorful, sturdy vinca (Catharanthus roseus) as the workhorse of our summer gardens. With its pretty pink, white and purple blooms clustered en masse on a ...

Q: We live in the Coachella Valley. Our landscape is planted with many vinca plants that give us a lot of color, but last summer some of them started to die. The nurseryman said it was because of a ...