Rosa 'Margaret Merrill' (Rose 'Margaret Merrill')

Botanical name

Rosa 'Margaret Merrill'

Other names

Rosa 'Harkuly', Rose 'Margaret Merrill', Hybrid tea rose 'Margaret Merrill'

Genus

Rosa Rosa

Variety or Cultivar

'Margaret Merrill' _ 'Margaret Merrill' is an upright, deciduous shrub with thorny branches bearing pinnate leaves divided into large, glossy, toothed, dark-green leaflets. In summer and autumn, it bears clusters of large, strongly fragrant, double, white flowers, sometimes flushed pink, with yellow stamens.

Foliage

Deciduous

Fragrance

Flower is strongly fragrant

Habit

Upright

Awards

RHS AGM (Award of Garden Merit)

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Colour

Flower

White in Summer; White in Autumn

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn

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How to care

Watch out for

Specific pests

Aphids , Caterpillars , Deer , Glasshouse red spider mite , Leafhoppers , Rabbits , Rose leaf-rolling sawfly , Scale insects

Specific diseases

Powdery mildew , Rose black spot , Rose rust

General care

Propagation methods

Budding, Hardwood cuttings

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Monthly care advice

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Where to grow

Rosa 'Margaret Merrill' (Rose 'Margaret Merrill') will reach a height of 1m and a spread of 1m after 2-5 years.

Suggested uses

Beds and borders, City, Cottage/Informal, Flower Arranging

Cultivation

Plant in moist but free-draining or free-draining soil, preferably in full sun. Avoid planting in sites that have previously been used for growing roses

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, East, West

Exposure

Exposed, 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, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Rosa 'Margaret Merrill' (Rose 'Margaret Merrill')

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

Type

Insect

Current status in UK

Absent

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

2

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

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Rosa 'Margaret Merrill' (Rose 'Margaret Merrill')

Common pest name

Scientific pest name

Phyllocoptes fructiphilus

Type

Mite

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

Pest of economical and socially important host in the UK; which is currently absent. If introduced it has the potential to cause significant damage. Statutory action against findings is justified and regulation of the pest advised.

Defra's Risk register #3

Plant name

Rosa 'Margaret Merrill' (Rose 'Margaret Merrill')

Common pest name

Apple root knot nematode

Scientific pest name

Meloidogyne mali

Type

Nematode

Current status in UK

Unknown

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

UK (along with certain other European countries) received potentially infested trees in 1992; but these were destroyed at the end of the trial period and targeted surveillance has failed to find any trace of the nematode. Main impacts are on elm; apple and mulberry and industry should source such material carefully.

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/