Which clematis flowers the longest

Of those clematis which had held the coveted AGM in , 15 were deleted, and six new varieties were added. A total of 79 clematis now hold the award, a testimony to the great variety of different garden-worthy plants. Tougher by far are the many varieties of C. Hardy and floriferous, these will happily tolerate a shady north or east-facing spot as long as the soil is free-draining, while their small, bell-shaped flowers, which appear in April-May, have a discreet beauty a world away from that of the flashier, large-flowering types.

Of the various cultivars available, the RHS singles out five — C. Neither, with a hardiness rating of only H4, are they suitable for cold or exposed gardens. Compact and colourful, this group make wonderful wall or container-grown specimens. Summer marks the peak of the clematis season, beginning with a wealth of large, late flowering cultivars LLs such as the ever-popular C.

And then, in early autumn comes the spreading, sun-loving C. But if I had to grow only one clematis, I would choose a variety from the hardy viticella group, probably the longest-flowering July-September , most floriferous, vigorous, versatile and garden-worthy of all the categories. Viticellas belong to Group 3 of the clematis genus and along with so many of the other plants in this category, they look wonderful growing through or up a vigorous companion plant to extend or add to its season of interest.

Dig a hole cm deep and wide cm away from the base of a wall, 60cm away from the base of a host tree. Excluding herbaceous and evergreen types, the traditonal advice is to plant deeply to avoid clematis wilt, ensuring the top of the rootball is roughly eight centimetres below the finished level of the soil.

Backfill, water, and protect against slugs. Continue to water regularly until well established. All clematis should be hard-pruned at some point within the first year of planting. To ensure good flower production, add a handful of sulphate of potash to the surrounding soil in April and water in. The flowers are coconut scented and for much of its season the silvery seed heads overlap with flowering to provide an unusual, interesting season of interest.

Found growing in a Durham garden centre in Prune hard in spring, but best left to scramble through a tree. The one clematis almost everyone knows, its slightly nodding, four-petalled deep purple flowers open in generous numbers through July, August and September.

Dating back to the mid s, although this AGM plant is invaluable, it may not actually be the same as the 19th century original introduced by George Jackman which is probably lost. The first widely grown hybrid between a herbaceous perennial species and a large-flowered hybrid, 'Arabella' is especially known for its very long flowering season starting in June, peaking from July to September, then continuing into October.

Six-petalled flowers open in deep purple-blue then lighten with age to reveal pinkish mauve veining and central bar. Very distinctive in its four-petalled white flowers, each with an irregular green splash in the centre of every petal which almost disappears in full sun. This prolific variety, which has been around since about , flowers from July to September and is best planted to scramble through a mature, spring-flowering shrub such as a viburnum or holly.

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They can grow through shrubs, climbing roses and into small trees. They are gentle plants and do not smother their supporters. Their flowers are incredibly large, in. Star-shaped, they may be single, semi-double or double and are available in a wide range of colors. They usually bloom in two waves. They bloom in late spring or early summer on the previous year's growth.

They often repeat blooming in late summer and early fall on new wood. These clematis are quite versatile. They can be grown in large containers too. Healthy, sturdy, easy to please, the Montana group of clematis includes the most vigorous deciduous climbers within the clematis family. Their flowers are not as large or flashy as those of the large-flowered Clematis varieties, but they are full of charm, fragrant and so abundant!

A plant can get covered with thousands of blooms, rewarding gardeners with a spectacular floral display. These Chinese natives are very strong growers and will happily throw their shoots in splendid flowering trails over arbors, trellises, pergolas and other garden structures.

The Herbaceous Clematis group contains wonderful herbaceous perennials for the border, which clamber over other plants. They die to the ground at the end of each year, and have no twining petioles to help them climb. Among the easiest Clematis to grow, Herbaceous Clematis are long-lived. They bloom profusely over a long season, from early summer to early fall, with the bonus of attractive foliage. If deadheaded after their first flush of blooms, they will bloom again within days.

Depending on your geographic area, you may enjoy 2 or 3 waves of colorful blooms. They are ideal for growing through plants in the herbaceous border. Their flowers are impressively large, in. They bloom between early and mid summer on new wood. They often repeat flowering in late summer and early fall. The Viticella group of clematis originates from Southern Europe Italian Clematis and includes deciduous climbing shrubs regarded as being durable, easy-care, vigorous and free-flowering.

They bloom profusely over a long period extending from midsummer to fall. They can be grown in large containers if these vigorous climbing vines have room enough to grow. The small-flowered Orientalis group contains the truly yellow clematis. Mostly originating from central Europe and Asia, this group comprises species such as Clematis orientalis, Clematis serratifolia, Clematis tangutica or Clematis tibetana. Their bright yellow flowers are lantern- or star-shaped and often nodding.

Each flower produces showy pom-pom like seedheads with silvery silken tails that persist and disperse over the winter and early spring months. They bloom profusely from mid-late summer to late fall and make a particular conspicuous appearance in autumn when color has disappeared elsewhere in the garden. These Oriental clematis can be trained over arbors, pergolas or fences. They partner well will the biggest rambler roses and create a stunning effect in conifers that tolerate some companionship.