Streptosolen jamesonii (Marmalade bush)

Botanical name

Streptosolen jamesonii

Other names

Marmalade bush, Firebush, Orange browallia, Browallia jamesonii

Genus

Streptosolen Streptosolen

Species

S. jamesonii - S. jamesonii is a tall, tender, slender-stemmed, scrambling to semi-climbing evergreen shrub with ovate to elliptic, finely wrinkled, dark green leaves and clusters of slender, tubular, yellow to orange-yellow flowers from late spring to late summer.

Foliage

Evergreen

Habit

Climbing

Toxicity

All parts may be toxic if ingested.

Awards

RHS AGM (Award of Garden Merit)

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Colour

Flower

Yellow, Yellow-orange in Spring; Yellow-orange, Yellow in Summer

Foliage

Dark-green in All seasons

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How to care

Watch out for

Specific pests

Aphids , Glasshouse red spider mite , Glasshouse whitefly

Diseases

Generally disease-free.

General care

Pruning

Pruning group 8 or 9 in late winter or early spring; group 13 if wall-trained.

Propagation methods

Semi-hardwood cuttings, Softwood cuttings

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Monthly care advice

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Where to grow

Streptosolen jamesonii (Marmalade bush) will reach a height of 3m and a spread of 2.5m after 5-10 years.

Suggested uses

Beds and borders, Conservatory, Containers, Indoor, Sub-Tropical, Wallside and trellises

Cultivation

Grow under glass in loam-based compost in full light with shade from hot sun. In growth, water freely & feed monthly; sparingly in winter. Outdoors in frost-free areas, grow in fertile, moist but well-drained soil in full sun.

Soil type

Loamy, Sandy

Soil drainage

Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, East

Exposure

Sheltered

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

Indoor heated (H1), Tender in frost (H3)

USDA zones

Zone 10, Zone 9, Zone 8

Defra's Risk register #1

Plant name

Streptosolen jamesonii (Marmalade bush)

Common pest name

; Black wood of grapevine; Female sterility of tobacco; Fruit woodiness of tomato; Maize Redness; Mal azul of tomato; Metabolbur; Metastolbur; Parastolbur; Purple top of potato; Stolbur of potato; Stolbur of tobacco; Stolbur of tomato

Scientific pest name

Candidatus Phytoplasma solani

Type

Phytoplasma

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

Phytoplasma which potentially affects a wide host range; determined by the feeding behaviour of vectors. First UK outbreak in 2014; on strawberry; a host not specifically regulated in EU legislation. This legislation should be reviewed to take account of this and other developments.

Defra's Risk register #2

Plant name

Streptosolen jamesonii (Marmalade bush)

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 #3

Plant name

Streptosolen jamesonii (Marmalade bush)

Common pest name

Scientific pest name

Xiphinema bakeri

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 pest; could potentially affect trees and other species if introduced but many pathways regulated. No evidence of interceptions or findings to date.

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/