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Clematis viticella Sunny Sky

Clematis viticella Sunny Sky
Clematis [Sunny Sky]

4,4/5
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Although the clematis has suffered during transportation, I believe it will recover. I will see how it goes over time.

nicole , 31/05/2020

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A vigorous clematis that is perfectly hardy. Throughout summer, it produces an avalanche of small violet-blue flowers, with slightly curved petals, presenting a darker central band. Plant this pretty climber in the garden or in a pot on a sunny patio. It prefers fertile, moist but well-drained soil.  
Flower size
6 cm
Height at maturity
2 m
Spread at maturity
1 m
Exposure
Sun, Partial shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time March to May, September to October
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Flowering time June to September
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Description

Clematis Sunny Sky (Zosusk') is a particularly vigorous and hardy climber. In summer, it produces a cascade of small flowers with single blue-violet petals and a yellow-green centre, with slightly recurved petals and a darker central band. This beautiful variety will enhance any garden support with its generous and graceful flowering. It will look sublime in a pot on a patio or balcony.

 

Clematis 'Sunny Sky' belongs to the Ranunculaceae family. It is a Dutch hybrid derived from C. viticella. It belongs to the group of late-flowering clematis, blooming on the current year's shoots. Clematis attach themselves to their support through petioles transformed into tendrils. This magnificent Italian clematis is a semi-woody climbing plant with deciduous foliage composed of medium green pinnate leaves with ovate leaflets that are slightly acuminate. It grows rapidly and can reach a height of 1.5 to 2m (5 to 7ft), with a spread of about 1m (3ft). From June to September, this splendid variety is covered with a mass of single flowers bearing 4 or 5 petals that are slightly recurved and concave, measuring 5 to 8cm (2 to 3in) in diameter. Its foliage almost disappears under the avalanche of its blue-violet flowers, with a darker central band, contrasting beautifully with a yellow-green stamen centre.

 

Clematis 'Sunny Sky' received a gold medal in 2009 at the famous Plantarium international trade fair in Boskoop, the Netherlands.

 

Late-flowering clematis, the quintessential climbing plants, are easy to grow and can be arranged in countless ways. Their undeniable romanticism pairs well with climbing and rambling roses. They dress up any type of support and can prolong the appeal of a faded hedge while waiting for the colours of autumn. Trained on a tree, they will brighten up foliage that is too monochromatic. When grown in pots, you can admire them on a patio or balcony. In any case, be sure to protect them from the hottest sun. The 'Sunny Sky' variety will be stunning when combined with a climbing rose, Japanese maple, bamboo, or wisteria. Use medium-height perennials to shade its base, such as epimedium, daylily, shasta daisy, hellebore, or avens. Choose species with yellow foliage or flowering to create a charming contrast with the blue-violet flowering of this clematis.

Clematis viticella Sunny Sky in pictures

Clematis viticella Sunny Sky (Flowering) Flowering

Plant habit

Height at maturity 2 m
Spread at maturity 1 m
Growth rate normal

Flowering

Flower colour blue
Flowering time June to September
Inflorescence Solitary
Flower size 6 cm
Fruit colour grey

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Clematis

Species

viticella

Cultivar

Sunny Sky

Family

Renonculacées

Other common names

Clematis [Sunny Sky]

Origin

Cultivar or hybrid

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Planting and care

Clematis 'Sunny Sky' is a perfectly hardy and robust variety. It appreciates a sunny exposure, but can tolerate a partially shaded spot. It prefers fertile, humus-rich, moist and well-drained soil. Clematis like to reach towards the sun, with their base in the shade. It is essential that the base of its stem and its roots are in the shade. For this, a flat tile placed at an angle will provide the necessary shade. Similarly, a bushy perennial or low shrub planted in front of the clematis will also provide perfect protection against the sun, attractively concealing the clematis stump.

Take care when handling the root ball as clematis roots are quite fragile. Work the soil deeply and incorporate compost and a handful of bone or dried blood powder. A base fertiliser will benefit the clematis's establishment. During the first few weeks after planting, regular but moderate watering will be necessary to keep the soil consistently moist. The main enemy of clematis is humidity, so the soil should never be waterlogged. Indeed, overly wet soil can cause the wilting of its stems and leaves, often resulting in death. Plant it in the hole at an angle, with the stem oriented towards the support it will climb on. Cover with soil, creating a small mound to properly cover the base and stem to reduce the risk of wilting and encourage vigorous shoots from the stump.

After planting, prune the stems of summer-flowering clematis to 30 to 40cm (12 to 16in) above a pair of buds.

Train the stems, without squeezing them, until the plant can grip on its own with its petioles.

Mulch in February with garden compost or well-rotted manure, avoiding direct contact with the stems.

 

Planting period

Best planting time March, October
Recommended planting time March to May, September to October
Type of support Arbour, Arch, Pergola, Tree, Trellis, Wall

Intended location

Suitable for Meadow, Woodland edge
Type of use Border, Back of border, Container, Hedge, Climbing
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Neutral
Soil moisture Moist soil, Fertile, deep and well-drained.

Care

Pruning instructions It flowers on the current year's shoots in summer. It should be pruned short in February-March, before the start of vegetation, by cutting back all the previous year's stems to 30cm (12in) from the ground, above a pair of large buds. It will then produce long and vigorous shoots from the base, heralding a beautiful flowering and forming a compact clump. Prune short because the regrowth will be stronger.
Pruning Pruning recommended once a year
Pruning time February to March
Soil moisture Moist soil
Disease resistance Good
Overwinter Can be left in the ground
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