Both vinca major and vinca minor are species in the plant family of Apocynaceae. Vincas are heat lovers, and depending on your area’s weather, they will act as an annual or perennial. Vincas are hardy flowering plants and, if grown under the right conditions, need little tending to. Once only found in the colors of white and lilac, vincas, also called periwinkle, now come in purples, pinks and scarlet. Planting vinca in your flower garden will give you a wealth of blooms from spring through summer.
Wait until the warm weather of spring to place vinca plants in the garden. Vinca will not tolerate frosts or freezes and will die.
Select an area in your landscape to plant vinca that receives either full or partial sunlight. Vinca will flower and grow best if planted in an area that receives some sunshine throughout the day.
Remove or kill any weeds, grasses or vegetation that is growing in the planting area and will compete with young plants. If you use herbicides to kill the unwanted vegetation, wait one to two weeks before setting the vinca plants into the ground.
Use the sand to amend soils that do not drain properly. Amend sandy or poor soils with the compost. Work both materials about eight inches into the existing soil. Vincas prefer to grow in a rich, well-draining soil medium. If you are planting the vincas inside a container, fill the container with a well-draining potting mix that includes peat. Be sure the container has drain holes.
Dig a hole that is a little wider than the vinca’s root ball, but no deeper than the roots are growing inside the container. Carefully remove the plant from the container and place it in the ground. Pack the soil firmly around the base of the plant. Space multiple vincas about one foot apart.
Water the newly planted vincas well. Keep the planting site or container moist for the first few weeks while the roots establish themselves. Continue with a watering schedule of once or twice per week, depending on how hot and dry the weather is. If the plants begin to wilt, give them a dose of water.
Fertilize the vincas once per month with a bloom-boosting fertilizer such as a water-soluble 20-20-20 mix. Cover the entire foliage with the fertilizer.