Vinca flowers, also known as Madagascar periwinkle, are tropical perennials that are grown as annuals in most regions. They have flowers and foliage that resemble impatiens, but rather than being a shade lover, they are perfect for sunny locations. The foliage is dark green and leathery. Depending on the variety, fast-growing vinca is 6 to 18 inches tall with a similar spread. Annual vinca plants bear single blooms with five petals that frequently touch or overlap from early summer until the first frost. Many varieties feature a contrasting eye. If you haven’t included vincas in your garden for a while, you should check out the expanded color palette that now includes blooms in every shade of the pink, rose, and lilac spectrum. No matter your preference, all are attractive to butterflies and are rabbit-resistant. All parts of the annual vinca plant are toxic to dogs, cats, and people.
Here are some step-by-step instructions for taking care of Vinca flowers: Planting: Vinca flowers prefer well-draining soil and full sun to partial shade. Space the plants 12-15 inches apart and water well after planting. Watering: After planting, weekly watering is all the plant needs. Vinca requires little water after it becomes established and shows new growth. Fertilizing: Use a general-purpose fertilizer once or twice a season. Pruning: Prune Vinca once a year to keep it disease-free and healthy growing.