Flowers have a lavender-blue color, reach a diameter of 15 centimeters. in the large flowered varieties. Not all clematis are hardy in Iowa, but numerous species and cultivars can be successfully grown in the state. Each looks like a whirring pinwheel of colorful petals around a fluffy yellow center, and appears on elegant, slender stems from among delicately toothed foliage. Types of Clematis Vining clematis can be divided into three groups. Long-growing shrub vine reaches a height of 2.5 meters. Clematis blooms are typically pink, purple, or white, and they will bloom at various times throughout the year. Members of the Ranunculaceae family, Clematis include more than 300 species, hundreds of hybrids and are divided into 12 main groups, each with consistent flower size, blooming season, pruning and garden use characteristics. The flowers are creamy white, large, 18 cm in diameter. Grade "John Paul II" This variety was named in honor of the Pope. Although most clematis varieties are unsuitable for the rigors of Zone 3 and Zone 4 winters, luckily there are cold hardy species and cultivars to be found in all three clematis groups. Clematis are one of the best climbers you can grow, with hundreds of varieties to choose from. There are over 300 different species of this plant that you can plant in your garden. The distinctive, prolific blooms easily measure five to six inches wide, are doubles in spring, and semi-double in fall. Blue Light® Clematis Clematis 'Vanso' Plant Patent #15,953. Variety "Clematis Durand" Variety "Clematis Durand" is considered one of the widespread and at the same time one of the most beautiful. Sort "Blue Light" Clematis of this variety reaches a height of 2.5 meters. From tree huggers to container varieties, there is a Clematis for every garden and flowers for almost every month of the year! White clematis are considered the most capricious varieties. Most clematis flowers are shades of pink, purple and white, but you could also try growing yellow-flowered species like Clematis tangutica and Clematis repens.Some clematis are popular with bees and other insects, while others form fluffy seedheads, which birds like to use to line their nests. The plant should be planted in sunny areas, well protected from the wind. It blooms earlier in spring than other clematis, and with flowers like nothing else you've seen. White Clematis Varieties. Blue Clematis Varieties. Easy to grow, with excellent disease and pest resistance. They require special care and skill. Such plants are perfectly combined with blue or pink perennials. Sku #1590. Sparky Blue clematis isn't your run-of-the-mill flowering vine. A delightful, award-winning sport of Mrs. Cholmondeley Clematis with large, violet-blue to pale blue flowers. Before purchasing any perennial, always be sure to check the zone rating to ensure that it can survive in your region. Some clematis can grow 8 to 12 feet in a single season, others reach a height of only 2 to 4 feet. There are more than 250 species of clematis and several hundred cultivars. Clematis is a type of plant that can be found in a diverse number of flower shapes and colors.