Vinca minor and Vinca major are two different species of the Vinca plant, commonly known as periwinkle. While they share some similarities, there are distinct differences between the two.
1. Growth Habit:
– Vinca minor, also known as common periwinkle or creeping myrtle, is a low-growing, trailing plant that forms a dense ground cover. It typically reaches heights of 6-12 inches and spreads vigorously by sending out runners or stolons.
– Vinca major, also called bigleaf periwinkle or large periwinkle, is a more upright and larger plant compared to Vinca minor. It can grow up to 1-2 feet tall and has broader, more substantial leaves.
2. Leaf Characteristics:
– Vinca minor has small, dark green leaves that are elliptical or lance-shaped. The leaves are about 1-2 inches long and glossy in appearance.
– Vinca major has larger leaves, around 2-3 inches long and broadly ovate or heart-shaped. The leaves are also glossy but have a lighter green color compared to Vinca minor.
3. Flower Size and Color:
– The flowers of Vinca minor are smaller, around 1 inch in diameter, and typically a deep violet-blue color. However, cultivars with white or pink flowers are also available.
– Vinca major produces larger flowers, about 2 inches in diameter, and they come in a wider range of colors including purple, lavender, white, and pink.
4. Cold Hardiness:
– Vinca minor is more cold-hardy than Vinca major. It can tolerate colder temperatures, down to USDA hardiness zones 4-9, making it suitable for a wider range of climates.
– Vinca major is less cold-tolerant and is typically grown in USDA hardiness zones 7-9. In colder regions, it may suffer frost damage or die back during winter.
5. Growth Rate and Invasiveness:
– Vinca minor is known for its vigorous growth and ability to spread rapidly. It can quickly form a thick mat, smothering out competing plants. While this aggressive spreading habit can be beneficial as a ground cover, it can also become invasive in certain areas if not properly controlled.
– Vinca major is also capable of spreading, but it is generally less aggressive compared to Vinca minor. It is less likely to become invasive unless planted in ideal conditions with no natural controls.
Vinca minor and Vinca major differ in their growth habit, leaf characteristics, flower size and color, cold hardiness, and invasiveness. It’s important to consider these differences when choosing which species to plant in your garden or landscape.
