Lavandula x intermedia 'Grappenhall' (Lavender 'Grappenhall')

Botanical name

Lavandula x intermedia 'Grappenhall'

Other names

Lavender 'Grappenhall'

Genus

Lavandula Lavandula

Variety or Cultivar

'Grappenhall' _ 'Grappenhall' is a bushy, rounded, evergreen shrub with slender, upright stems bearing linear, aromatic, grey-green leaves and dense, terminal spikes of tiny, fragrant, violet flowers in summer.

Foliage

Evergreen

Fragrance

The flowers are strongly fragrant and suitable for drying.

Habit

Bushy, Compact, Erect flower stem

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Colour

Flower

Violet in Summer

Foliage

Grey-green in All seasons

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How to care

Watch out for

Specific pests

Cuckoo spit , Rosemary leaf beetle

Specific diseases

Grey mould

General care

Pruning

Pruning group 10, after flowering.

Propagation methods

Semi-hardwood cuttings

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Monthly care advice

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Where to grow

Lavandula x intermedia 'Grappenhall' (Lavender 'Grappenhall') will reach a height of 0.9m and a spread of 0.9m after 2-5 years.

Suggested uses

Banks and Slopes, City, Coastal, Cottage/Informal, Drought Tolerant, Flavouring food and drinks, Flower Arranging, Beds and borders, Garden edging, Gravel, Mediterranean, Containers, Rock, Wildlife

Cultivation

Plant in well-drained soil in full sun. prefers alkaline to neutral soil but tolerates acid conditions. Does best in a sheltered position. Will not tolerate waterlogged conditions. Avoid high nitrogen fertilisers and manure as this will cause the plant to

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

East, West

Exposure

Sheltered

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

Hardy (H4)

USDA zones

Zone 10, Zone 9, Zone 8, Zone 7, Zone 6

Defra's Risk register #1

Plant name

Lavandula x intermedia 'Grappenhall' (Lavender 'Grappenhall')

Common pest name

Alfalfa dwarf; Anaheim disease; California vine disease; Dwarf disease of alfalfa; Dwarf disease of lucerne; Leaf scald of oleander; Leaf scald of plum; Leaf scorch; Phony disease of peach; Pierce's disease of grapevine; Variegated chlorosis of citrus

Scientific pest name

Xylella fastidiosa subsp. multiplex

Type

Bacterium

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)

4

General biosecurity comments

A bacterial disease with a wide host range detected in Corsica. Although EU regulated; there remains some concern about the risk of introduction. This subspecies is known to be able to thrive in cooler climates. Should an outbreak occur; there would be a need for eradication action which would result in environmental and social impacts.

Defra's Risk register #2

Plant name

Lavandula x intermedia 'Grappenhall' (Lavender 'Grappenhall')

Common pest name

Scientific pest name

Hyalesthes obsoletus

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)

4

General biosecurity comments

Planthopper which can vector the pathogen causing Potato stolbur disease. Present elsewhere in Europe and increasing its range due to a new a nettle-preferring race. Main breeding hosts are not traded as planting material; but some minor hosts (e.g. Lavender) are.

Defra's Risk register #3

Plant name

Lavandula x intermedia 'Grappenhall' (Lavender 'Grappenhall')

Common pest name

tomato thrips

Scientific pest name

Ceratothripoides brunneus

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

Thrips present in Africa; the Caribbean and parts of Asia; frequently intercepted in the UK. Can cause significant damage to tomatoes and other crops in countries where it is present. Europe wide PRA will consider its potential to establish and cause damage.

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/