- Species and varieties: Vinca, commonly known as periwinkle, belongs to the Apocynaceae family. The most common species include Vinca minor (lesser periwinkle) and Vinca major (greater periwinkle). The purple variety is often referred to as Vinca minor 'Atropurpurea' or Vinca major 'Variegata'.
- Hybrid or heirloom: Vinca seeds are typically heirloom varieties, meaning they are open-pollinated and can be saved and replanted each year. However, some hybrid varieties may also be available, offering specific traits such as improved disease resistance or unique flower colors.
- Pruning and training: Vinca requires minimal pruning. However, trimming back the plants in early spring can encourage new growth and maintain a tidy appearance. Deadheading spent flowers can also promote continuous blooming.
- Fertilization needs: Vinca is relatively low-maintenance when it comes to fertilization. A balanced, slow-release fertilizer applied in the spring can support healthy growth. Over-fertilization should be avoided as it can lead to excessive foliage growth at the expense of flowers.
- Hardiness zones: Vinca minor is hardy in USDA zones 4-9, while Vinca major is hardy in zones 7-9. These plants are known for their ability to thrive in a variety of conditions, making them versatile for different climates.
- Climate requirements: Vinca prefers well-drained soil and can tolerate a range of light conditions from full sun to partial shade. They are drought-tolerant once established and can thrive in both warm and cool climates, although they prefer moderate temperatures.