Clematis 'Helios' (Ta)

RHS Plant Profile

clematis 'Helios'

Other common names

clematis [Aztek], clematis 'Sun Stor'

Synonyms

Clematis tangutica 'Helios'
Clematis 'Daihelios'
Clematis Aztek

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A deciduous climber, 1-2.2m in height, with opposite green leaflets on twining leaf-stalks. Bright yellow, coconut-scented, nodding flowers start lantern-shaped and then open to flattened stars; borne from summer through into autumn and followed by fluffy, silver seedheeds in autumn

Max Height

1.5-2.5 metres

Max Spread

1.5-2.5 metres

Size

Max Spread: 1.5-2.5 metres
Max Height: 1.5-2.5 metres

Botanical Details

Family: Ranunculaceae
Native to GB/Ireland: No
Potentially harmful: Skinirritant.Wearglovesandotherprotectiveequipmentwhenhandling.Pets(rabbits):Harmfulifeaten.Forfurtherinformationandcontactnumbersregardingpets,seetheHTAguidetopotentiallyharmfulplants
Genus: Clematis can be deciduous or evergreen shrubs or herbaceous perennials, mostly climbing by twining leaf-stalks, and often with showy flowers. Some have attractive fluffy seedheads in autumn
Name Status: Accepted
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: Tangutica Group consists of deciduous climbers with ternate or pinnate leaves and small, bell- or star-shaped flowers appearing on the current year's growth in summer and early autumn

How to Grow

Cultivation

Plant in a moisture-retentive, well-drained soil, with the roots and base of the plant kept cool and shaded by other plants or a layer of pebbles at the base. Plant with the crown 5-8cm (2-3in) deep to encourage new shoots to grow from below ground level. See clematis cultivation

Propagation

Propagate by layering or semi-hardwood cuttings

Pruning

See clematis pruning: group three

Pests

May be susceptible to aphids, capsid bug, slugs and snails

Diseases

May be susceptible to honey fungus (rarely), clematis wilt and clematis slime flux