When gardeners speak of vinca, they may refer to one of three different varieties within the same plant family. Vinca minor is a spreading groundcover and Vinca major is a vining annual that often spills over the edges of garden pots. Vinca rosea is an annual bedding flower with dainty and brightly colored blossoms. The vinca plants have a sturdy composition and are able to tolerate drought conditions without suffering. Give them regular fertilizer throughout the growing season, and they will perform energetically wherever you plant them.
Mix the fertilizer with water in the watering can according to package recommendations for the size of the container or planting area where the vinca grows.
Pour the fertilizer carefully around the soil where the vinca grows, taking care not to splash fertilizer onto the plant foliage and blossoms. Saturate the soil completely with fertilizer.
Water the vinca immediately after you fertilize to help the fertilizer absorb into the soil. Rinse any fertilizer off the plant foliage if fertilizer inadvertently splashed during the application process.
Repeat the fertilization process once each month to keep vinca growing and thriving in a garden space or container.