Rhododendron 'Hekla' (Rhododendron 'Hekla')

Botanical name

Rhododendron 'Hekla'

Other names

Rhododendron 'Hekla', Evergreen azalea 'Hekla', Spider azalea 'Hekla', Rhododendron simsii 'Hekla', Indian azalea 'Hekla'

Genus

Rhododendron Rhododendron

Variety or Cultivar

'Hekla' _ 'Hekla' is a compact, bushy, frost-hardy, evergreen shrub with linear, dark green leaves and, from spring to early summer, white flowers with linear to narrowly lance-shaped petals and prominent green stamens.

Foliage

Evergreen

Habit

Compact, Bushy

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Colour

Flower

White in Spring; White in Summer

Foliage

Dark-green in All seasons

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How to care

Watch out for

Specific pests

Aphids , Caterpillars , Lacebugs , Leafhoppers , Vine weevil

Specific diseases

Powdery mildew , Rhododendron bud blast , Rhododendron petal blight , Silver leaf

General care

Pruning

Pruning group 8

Propagation methods

Grafting, Layering, Semi-hardwood cuttings

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Monthly care advice

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Where to grow

Rhododendron 'Hekla' (Rhododendron 'Hekla') will reach a height of 0.3m and a spread of 0.3m after 10-20 years.

Suggested uses

Greenhouse, Containers, Conservatory, City, Indoor, Sub-Tropical

Cultivation

Under glass or indoors, grow in ericaceous compost in bright light & moderate to high humidity. In growth, water freely & feed monthly. Mist daily in bud. In cold areas, can be moved outdoors in summer with compost kept consistently moist.

Soil type

Loamy, Sandy

Soil drainage

Moisture-retentive, Moist but well-drained

Soil pH

Acid

Light

Partial Shade, Full Sun

Aspect

South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4), Tender in frost (H3)

USDA zones

Zone 11, Zone 10, Zone 9, Zone 8

Defra's Risk register #1

Plant name

Rhododendron 'Hekla' (Rhododendron 'Hekla')

Common pest name

Ramorum leaf blight; Ramorum shoot dieback; Rhododendron twig blight; Sudden oak death

Scientific pest name

Phytophthora ramorum

Type

Oomycete

Current status in UK

Present (Limited)

Likelihood to spread in UK (1 is very low - 5 is very high)

4

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Pathogen of larch and other hosts subject to EU emergency legislation. A containment strategy is in place in the UK; reflecting its presence in wider environment/forestry settings in some areas. EU regulatory status is under review.

Defra's Risk register #2

Plant name

Rhododendron 'Hekla' (Rhododendron 'Hekla')

Common pest name

leaf rust of blueberry

Scientific pest name

Thekopsora minima

Type

Fungus

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

4

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Rust fungus affecting blueberry and hemlock. This fungus has been detected in Europe (Germany; Netherlands and Portugal). Some uncertainty about the suitability of UK native host species. But the case for regulation should be considered based on the EPPO PRA.

Defra's Risk register #3

Plant name

Rhododendron 'Hekla' (Rhododendron 'Hekla')

Common pest name

pink wax scale; red was scale; ruby wax scale

Scientific pest name

Ceroplastes rubens

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

3

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Based on its biology and low potential impact continued action on this pest in the UK would not be considered appropriate. It is likely to be of more concern to southern Member States of the EU; as it is an economic pest of citrus.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/