The periwinkle plant (Vinca flower) – Catharanthus roseus or lochnera rosea, also known as rosy periwinkles, is a lovely small plant that grows outside very well but also finds itself at home in a summer window.
The plant Catharanthus roseus is sometimes called Vinca minor and Vinca periwinkle. It’s also commonly called the Madagascar Periwinkle.
Here is the primary reason to use the correct botanical names of plants. Vinca minor is also known as the common periwinkle is a different plant and is considered an invasive species in:
- South Carolina
Periwinkle vinca minor carries the common names:
- Lesser periwinkle
- Periwinkle myrtle
- Creeping periwinkle
- Dwarf periwinkle
… serves as a ground cover plant where grass won’t grow.
On the other hand, Catharanthus roseus grows as an annual plant mainly used in sunny flower beds, pots and as a ground cover.
Both periwinkle vinca minor and vinca rosea are found in garden centers from early spring to late summer but have different uses.
This article focuses on periwinkle plant care, with its shiny green foliage and flowers of pink, red or white periwinkle which cover the plant all through the summer.
Is The Periwinkle Flower An Annual Or Perennial?
Normally, the vinca minor plant lasts only one year, however, that depends on where the periwinkle plant is growing.
In northern climates, it would be considered an annual that usually last for only one year.
However, in warmer climates, it can grow as a perennial. Indoors it makes an excellent windowsill plant.
It grows best in USDA hardiness zones 4 to 11.
Vinca Periwinkle Care
Vinca minor is a small upright grower and has a maximum height of about 8″-12″ inches tall. The leaves are very shiny and long, with a clear almost white center vein. I have seen plants stretch and grow taller than 8 inches when they did not have adequate light.
The Ralph Shugert periwinkle, under the vinca minor type, is an evergreen shrub that bears dark green leaves and violet-blue flowers.
Like most species, Ralph Shugert is drought tolerant, requires well-drained soil and enjoys full sun to partial shade. It can only grow up to 15 cm.
On the other hand, Vinca major or greater periwinkle is a bigger perennial species of family Apocynaceae.
Vinca minor plant grows up to 10″ inches tall (25 cm) and dense masses can pile up to 28″ inches wide (70 cm).
What Colors Do Periwinkle Flowers Come In?
The periwinkle flower comes in shades of pink, red or white and the flowers can be in several different shades and can either be plain or variegated.
What Kind Of Soil Do Vinca Flowers Need?
Periwinkles can be grown in the ground on in pots. No matter how they are planted they appreciate a well-drained soil. When planting in pots or containers a bagged potting soil will be fine.
If grown indoors on a windowsill, I would recommend a soil mix used to grow African violets.
This is because many potting soil mixes used outdoors may contain wood products and you could soon find yourself with a fungus gnat problem indoors.
Where Can The Periwinkle Flower Be Grown or Used?
Periwinkle plants are easy to grow and care for. Provide them a well-drained moist soil, plenty of bright light, warm temperatures 65° F and above and they will do wonderfully out on the patio or deck as potted plants.
Since the plant grows relatively low to the ground plants they make excellent additions as a ground cover or to container gardens in beds to add color below larger shrubs.
They also provide lots of easy color when grown in hanging baskets. Give plants lots of light with a little partial shade to protect them against the strong rays of the sun.
If plants become a little straggler, they can simply be cut back to make them bushier!
Plant periwinkles where they get good air, sun and drainage and there will be no keeping them from blooming.
You may also like –> Growing Trailing Vinca
How To Grow Periwinkle From Seed
Periwinkles are easy to grow from seed. This may be a better alternative than overwintering plants.
Where can you find periwinkle seeds? Like so many things – at Amazon!
You can sow seed at any time of the year but it is normal to sow seeds during the months of January through April. The seed is very, very light with 1 gram containing 700 to 800 seeds.
Cultivation usually is for 3 to 4 months and the seeds should germinate within the first 2 to 3 weeks at a temperature of 63 to 65°.
The seed should be sown in normal potting soil and covered with a thin layer of sand.
I like to mix the fine seed with builder sand – available at home improvement centers – when sowing to get an even distribution.
Keep the soil damp during this period. The total growing time from sewing to mature plant is about 3 to 4 months.
What Pests, Disease or Problems Does The Periwinkle Face?
During the summer months, plant lice aphids may attack. Usually, a good blast of water is one of the natural ways to get rid of aphids. Another is to apply organic insecticide neem oil sprays if needed but I have never needed to.
Lower Leaves Turing Yellow and Falling Off
When lower foliage turns yellow and fall off, it usually is the sign of too much water or the plant has been subjected to cold.
Back off the water or with it is cold related move the plant to a warmer position.
Leaves Droop and Fall
When leaves hang, droop and fall it normally is a periwinkle plant growing in a pot and has dried out too much. The best solution is to drop the whole pot into a bucket of Luke warm water for at least half an hour.
When the weather is warm, plants may need to be watered daily.
Related Reading: Is The Periwinkle Plant Poisonous?
Uses For Periwinkle Plant
Apart from functioning as a ground cover to areas where grass won’t grow, periwinkle also serves as a source of alkaloids for medicinal use. With a total of 86 alkaloids, the periwinkle plant extract covers a lot of benefits.
One of its products is vinpocetine, a synthetic derivative coming from the vincas alkaloid vincamine. This compound aids short-term memory and serves as an anti-aging agent.
Vincristine and vinblastine can treat various forms of cancer such as leukemia, child cancers, Hodgkin disease or Hodgkin lymphoma, and other types of lymphoma.
Summary Of Periwinkle Catharanthus Roseus
This native of Europe, India, and Madagascar is a fine plant to add color with minimal requirements. I prefer to grow the plant outdoors in the landscape as a ground cover or in containers, where color can be moved as needed.
Give the periwinkle plant a try… you won’t be disappointed.