Hibiscus trionum
Flower-of-an-hour, Bladder hibiscus, Bladder weed, Bladder ketmia, Venice mallow, Trailing hollyhock, Venus's mallow, Modesty, Goodnight at noon, Flower-of-the-hour, Devil's head in a bush, Black-eyed susan
Hibiscus Hibiscus
H. trionum - H. trionum is a vigorous, tender, erect to spreading, hairy annual or short-lived perennial with ovate, palmately-lobed, toothed, dark green leaves and, from summer into autumn, trumpet-shaped, pale yellow flowers with dark brown centres and purple stamens. Flowers are followed by bladder-like seed capsules.
Hibiscus trionum is: Deciduous
Upright, Spreading
Pale-yellow in Summer; Pale-yellow in Autumn
Dark-green in Spring; Dark-green in Autumn
Aphids , Mealybugs , Thrips Aphids , Mealybugs , Thrips
Powdery mildew Powdery mildew
Pruning group 9. Typically requires little or no pruning.
Sow seed at 13-18C in spring.
Semi-ripe cuttings, Seed
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Hibiscus trionum (Flower-of-an-hour) will reach a height of 0.75m and a spread of 0.6m after 2-5 years.
Sub-Tropical, Greenhouse, Containers, Conservatory
Under glass, grow in loam-based compost in bright, filtered light, ventilation & moderate humidity. Water freely & feed monthly in growth; sparingly in winter. Outdoors if frost-free, grow in moist, well-drained, neutral to alkaline soil in sun
Loamy
Well-drained
Alkaline, Neutral
Full Sun
South, West
Sheltered
Indoor heated (H1), Tender in frost (H3)
We do not currently have companion plants added for this plant.
Hibiscus trionum
Flower-of-an-hour, Bladder hibiscus, Bladder weed, Bladder ketmia, Venice mallow, Trailing hollyhock, Venus's mallow, Modesty, Goodnight at noon, Flower-of-the-hour, Devil's head in a bush, Black-eyed susan
Hibiscus Hibiscus
H. trionum - H. trionum is a vigorous, tender, erect to spreading, hairy annual or short-lived perennial with ovate, palmately-lobed, toothed, dark green leaves and, from summer into autumn, trumpet-shaped, pale yellow flowers with dark brown centres and purple stamens. Flowers are followed by bladder-like seed capsules.
Deciduous
Upright, Spreading
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Pale-yellow in Summer; Pale-yellow in Autumn
Dark-green in Spring; Dark-green in Autumn
Pruning group 9. Typically requires little or no pruning.
Sow seed at 13-18C in spring.
Semi-ripe cuttings, Seed
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Hibiscus trionum (Flower-of-an-hour) will reach a height of 0.75m and a spread of 0.6m after 2-5 years.
Sub-Tropical, Greenhouse, Containers, Conservatory
Under glass, grow in loam-based compost in bright, filtered light, ventilation & moderate humidity. Water freely & feed monthly in growth; sparingly in winter. Outdoors if frost-free, grow in moist, well-drained, neutral to alkaline soil in sun
Loamy
Well-drained
Alkaline, Neutral
Full Sun
South, West
Sheltered
Indoor heated (H1), Tender in frost (H3)
Zone 10, Zone 9
Hibiscus trionum (Flower-of-an-hour)
Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly
Bemisia tabaci non-European populations
Insect
Absent
2
5
Non-European populations of Bemisia tabaci pose an additional risk to European populations due to the potential for introducing non-European viruses.
Hibiscus trionum (Flower-of-an-hour)
Lance nematode; Nematode; Lance
Hoplolaimus spp.
Nematode
Absent
2
4
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.
Hibiscus trionum (Flower-of-an-hour)
Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly
Bemisia tabaci European populations
Insect
Absent
2
4
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.
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: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/
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This plant likes... | Garden match | |
Soil types: | Loamy | Tell us... |
Soil drainage: | Well-drained | Tell us... |
Soil pH: | Alkaline, Neutral | Tell us... |
Light: | Full Sun | Tell us... |
Aspect: | South, West | Tell us... |
Exposure: | Sheltered | Tell us... |
Hardiness: | Indoor heated (H1), Tender in frost (H3) | Tell us... |
By west London based garden designer Jonathan Snow. Jonathan’s inspiration for his Trailfinders Garden is the Winelands of the Western Cape of South Africa. read more
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