The evergreen perennial vinca minor has many useful functions in the garden. With its quick-spreading and trailing habit and dainty flowers in lavender-blue, white, wine red or deep blue, it makes a great ground cover, and also looks elegant spilling over the sides of either large or small containers. Luckily, it's easy to propagate vinca minor through the division process of separating one stem into separate new plants. Some soil preparation is necessary to make the job more effective and easier, but the actual process is fairly straightforward and quick.
Wet the soil in the current vinca flower bed thoroughly. Ensuring that the water reaches down a depth of 1 inch will allow you to get the entire root structure of the plant.
Lift up either one stem or a clump of stems about 5 to 6 inches from the end of the plant.
Pull up on the stem or clump of stems gently while digging underneath them at the same time with your trowel or knife, in order to loosen the roots of that stem or stems. Pull with a gentle or shaking motion. The goal is to pull the roots up from the ground as well as the stem.
Cut the stem or clump at the back of the 5- or 6-inch mark.
Continue to pull the stems toward the end of the plant, loosening the soil with your trowel as you go. Vinca minor sends out trailing stems that take root as they travel, so the roots you pull will be more and more shallow as you continue on the 6-inch stem.
Cut each section of the stem or clumps into separate sections, each with its own set of roots.
Replant the vinca minor sections in their new home, either stem by stem or with the entire clump intact.
Water the new plants thoroughly. This is an important step to give the new plants the best chance of growing quickly.