Sidalcea 'Rosanna' (Prairie mallow 'Rosanna')

Botanical name

Sidalcea 'Rosanna'

Other names

Prairie mallow 'Rosanna', Checkerbloom 'Rosanna', Sidalcea malviflora 'Rosanna'

Genus

Sidalcea Sidalcea

Variety or Cultivar

'Rosanna' _ 'Rosanna' is an erect, clump-forming perennial with lobed, rounded to kidney-shaped, mid-green basal leaves and strong, branching stems bearing dense, upright racemes of open, funnel-shaped, purple-pink flowers in summer

Foliage

Deciduous

Habit

Clump-forming, Erect

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Colour

Flower

Purple-pink in Summer

Foliage

Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn

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How to care

Watch out for

Specific pests

Slugs

Specific diseases

Rust

General care

Pruning

Cut back stems after flowering to encourage more blooms and to prevent self-seeding.

Propagation methods

Division

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Monthly care advice

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Where to grow

Sidalcea 'Rosanna' (Prairie mallow 'Rosanna') will reach a height of 0.9m and a spread of 0.45m after 2-5 years.

Suggested uses

Beds and borders, Cottage/Informal, Flower Arranging, Prairie planting

Cultivation

Plant in moist but well-drained, moderately fertile, humus-rich, light, sandy, neutral to slightly acid soil in full sun. Avoid heavy soils or those prone to waterlogging. Protect with a dry winter mulch during cold winters.

Soil type

Loamy, Sandy

Soil drainage

Moist but well-drained

Soil pH

Acid, Neutral

Light

Full Sun

Aspect

South

Exposure

Exposed, Sheltered

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

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5

Defra's Risk register #1

Plant name

Sidalcea 'Rosanna' (Prairie mallow 'Rosanna')

Common pest name

Lance nematode; Nematode; Lance

Scientific pest name

Hoplolaimus spp.

Type

Nematode

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)

4

General biosecurity comments

Nematode species potentially affecting a wide variety of crops; prohibition of soil likely to mitigate risk substantially; keep under review in light of interceptions or findings should they occur in the EU.

Defra's Risk register #2

Plant name

Sidalcea 'Rosanna' (Prairie mallow 'Rosanna')

Common pest name

cotton mealybug

Scientific pest name

Phenacoccus solenopsis

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

Watching brief for potential impact on tomato production in the Mediterranean. Other southern European countries likely to be more at risk. Precautionary action will be taken on findings on planting material to protect glasshouse crops and botanical gardens.

Defra's Risk register #3

Plant name

Sidalcea 'Rosanna' (Prairie mallow 'Rosanna')

Common pest name

Scientific pest name

Spilostethus hospes

Type

Insect

Current status in UK

Absent

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

1

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

3

General biosecurity comments

Seed bug unlikely to pose a significant threat to UK plant health.

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/