how to make vinca give flowers
Step 4. Make sure the plant is getting some sunlight. The vinca vine grows wonderfully as a groundcover under the bases of trees, but still needs some sunlight to get through to it for part of the day to produce flowers.Thin out or cut back some of the overhead branches to allow some light to get through to your vinca plants.tep 1. Vinca vines can slow down in their growth if they have been growing in one spot for several years, forming a thick mat of stems and roots. Thin out the mass by pulling out about two thirds of the plants.