Annuals Plants Summer Flowers. Vinca offers vivid color even during the hottest part of the summer. Vinca (Catharanthus roseus) offers a nearly foolproof way to have reliable, bright color even in the intense heat of southern summers. Hardy only in USDA Zones 10 and 11, vinca is grown as an annual bedding plant.
http://www.hgtv.com/outdoors/flowers-and-plants/annual-vinca-madagascar-periwinkle-our-favorite-flowers
We'd long ago given up on one of our favorite plants, vinca. Here in hot Davis, CA, our previous attempts ended with the plants becoming sick and dying virtually overnight. We tried the Cora and Cora Cascade in 2012 because of the new disease resistance. The results were fantastic.
http://parkseed.com/cora-mix-vinca-flower-seeds/p/51936-PK-P1/
The Colors of Vinca. Vinca flower colors include purple, blue and white. For a fast-growing groundcover with a profusion of flowers, many gardeners turn to vinca. The two species Vinca major and Vinca minor both thrive in U.S. Department of Agriculture plant hardiness zones 7 through 10, grow in sun or shade and require little care.
http://homeguides.sfgate.com/colors-vinca-43370.html
Periwinkle, or Vinca is often used as a ground cover, in beds and borders, or as a container plant. Plants, 4-18 inches tall, can be bushy and well-branched to spreadingmounds. Rounded, 11/2- inch to 2- inch blooms of white, pink, crimson, and lavender with overlapping petals are borne from summer till frost.
http://parkseed.com/cora-mix-vinca-flower-seeds/p/51936-PK-P1/
If you’re looking for big, bold color for sunny spots, the annual vinca varieties are probably for you. These plants have the botanical name Catharanthus and are bred from a heat- and drought-tolerant, sun-loving species from Madagascar.
http://www.costafarms.com/get-growing/news/a-shopper-s-guide-to-vinca
How to Grow Vinca or Periwinkle Plants. Vinca or Periwinkle is a prolific heat and drought tolerant annual, perfect for hot, dry areas. It's easy to grow, and requires little or no attention. A grower once reported that he has grown Vinca in the same location for 30 years. It successfully reseeded itself each year, with no effort on his part.
http://www.gardenersnet.com/flower/vincaperiwinkle.htm
Varieties of Annual Vinca. There are many series of annual vinca available, many with a full range of colors. Some that have done particularly well in our Trial Garden include: Cora: The Cora vinca collection features many colors, and both trailing and upright varieties. They’re known for their disease resistance. Soiree Kawaii: Kawaii varieties offer a very different look; they produce many smaller flowers, giving the plants more of a wildflower look.
http://www.costafarms.com/get-growing/news/a-shopper-s-guide-to-vinca
The Colors of Vinca. Vinca, a flowering perennial also known as periwinkle or myrtle, thrives in partial to full shade. The vinca produces 2-inch flowers that bloom in the spring. Annual varieties are also known as Madagascar periwinkle. Vinca comes in three varieties, major, dwarf and creeping. The most common color of vinca is lavender-blue, followed by purple.
http://www.ehow.com/info_8135537_colors-vinca.html
Printer Friendly Version (PDF) With heat, drought and poor soil tolerance, annual vinca (Catharanthus roseus), also known as Madagascar periwinkle, is a very popular annual in South Carolina. Annual vinca is available in a variety of colors. Karen Russ, ©2008 HGIC, Clemson Extension. The plants grow 1 or 2 feet high and about the same in width.
http://www.clemson.edu/extension/hgic/plants/landscape/flowers/hgic1158.html
Vinca Arizona Mix has the widest color range of any vinca mix. A rainbow of all vinca colors including reds, 1 1/2 blooms with contrasting starry eyes. Drought tolerant, loves heat. Space plants 8-10 apart.
http://www.burpee.com/flowers/vincas/vinca-arizona-mix-prod000417.html
what color are vinca flowers?
The colors of Vinca flowers are purple, blue, and white.   Purple, blue and white are the colors of vinca flower.