Hesperis matronalis var. albiflora (White dame's violet)

Botanical name

Hesperis matronalis var. albiflora

Other names

Hesperis matronalis alba, Hesperis matronalis 'Alba', White dame's violet, White sweet rocket

Genus

Hesperis Hesperis

Species

H. matronalis var. albiflora - H. matronalis var. albiflora is a rosette-forming, deciduous, biennial or short-lived perennial with leafy stems bearing ovate, elliptic, or oblong, hairy, toothed, dark green leaves and racemes or panicles of fragrant, white flowers in late spring and early summer.

Native to

Asia, Europe

Foliage

Deciduous

Fragrance

The sweet fragrance is most pronounced in the evening

Habit

Erect flower stem, Rosette, Upright

Colour

Flower

White in Spring; White in Summer

Foliage

Dark-green in Spring; Dark-green in Summer

How to care

Watch out for

Pests

Generally pest free

Specific pests

Aphids , Leafhoppers , Slugs

Diseases

Generally disease free

General care

Pruning

Cut back after flowering.

Propagation

Will come true from seed if grown away from other Hesperis colour variants.

Propagation methods

Basal cuttings, Seed

Monthly care advice

Where to grow

Hesperis matronalis var. albiflora (White dame's violet) will reach a height of 0.9m and a spread of 0.45m after 2 years.

Suggested uses

Beds and borders, Cottage/Informal, Garden edging, Gravel, Wildflower, Wildlife

Cultivation

Grow in moist but well-drained, neutral to alkaline, moderately fertile soil in full sun or partial shade. In cold areas, protect with a dry winter mulch. Flowering tends to diminish as the plant ages so may need replacing every two to three years.

Soil type

Loamy, Sandy

Soil drainage

Moist but well-drained, Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, 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, Zone 4

Defra's Risk register #1

Plant name

Hesperis matronalis var. albiflora (White dame's violet)

Common pest name

Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly

Scientific pest name

Bemisia tabaci non-European populations

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

Non-European populations of Bemisia tabaci pose an additional risk to European populations due to the potential for introducing non-European viruses.

Defra's Risk register #2

Plant name

Hesperis matronalis var. albiflora (White dame's violet)

Common pest name

Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly

Scientific pest name

Bemisia tabaci European populations

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)

4

General biosecurity comments

The UK has a protected zone in place for this pest which helps to mitigate the risk of entry and establishment. An EFSA opinion is currently being discussed at the EU Annexes Working Group which recommends further strengthening of the regulation.

Defra's Risk register #3

Plant name

Hesperis matronalis var. albiflora (White dame's violet)

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.

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/