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Flower-of-an-hour in the GardenTags plant encyclopedia

Hibiscus trionum

 

Flower-of-an-hour

A genus of hardy and tender annuals, evergreen and deciduous shrubs or small trees. The tender, evergreen species such as H. rosa-sinensis, are popular conservatory or house plants in temperate climates. These plants require winter protection in these cooler regions and can be grown as pot plants. The hardy species such as H. syriacus are suitable for annual or mixed borders. 'Trionum' is a rare annual or short-lived perennial with hibiscus-type flowers. The flowers have cream petals, purple-hued undersides, and deep burgundy centers. While each flower lasts only a single day, the plant blooms profusely all season and produces inflated seedpods.

 
plant Features
  • Flower-of-an-hour likes full sun

    Full sun

  • Flower-of-an-hour likes occasional watering

    Occasional watering

  • Flower-of-an-hour is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Flower-of-an-hour likes free draining and fertile

    Free draining and fertile

 
plant information

Common name

Flower-of-an-hour

Latin name

Hibiscus trionum

type

Evergreens

family

Malvaceae

ph

5.0 - 7.5 Acid - Neutral

  • Light

    Flower-of-an-hour likes full sun

    Full sun

  • Frost

    Flower-of-an-hour is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Soil

    Flower-of-an-hour likes free draining and fertile

    Free draining and fertile

  • Water

    Flower-of-an-hour likes occasional watering

    Occasional watering

Plant & bloom calendar

  •  
    Best time to plant
  •  
    When the plant will bloom

full grown dimensions

The size of a fully grown Flower-of-an-hour is 0.90meters x 0.90meters 0.90 M 0.90 M

Hibiscus trionum

A genus of hardy and tender annuals, evergreen and deciduous shrubs or small trees. The tender, evergreen species such as H. rosa-sinensis, are popular conservatory or house plants in temperate climates. These plants require winter protection in these cooler regions and can be grown as pot plants. The hardy species such as H. syriacus are suitable for annual or mixed borders. 'Trionum' is a rare annual or short-lived perennial with hibiscus-type flowers. The flowers have cream petals, purple-hued undersides, and deep burgundy centers. While each flower lasts only a single day, the plant blooms profusely all season and produces inflated seedpods.


Planting

From Early Spring TO Late Winter

Look under the individual varieties for planting guidelines

 

Flowering

From Early Spring TO Late Autumn

Flowers are generally funnel-shaped and are showy but short lived.

 

Propagation by seed

From Early Spring TO Early Spring

Sow seeds indoors 4 to 6 weeks before the last frost or outdoors after danger of frost has passed.

 
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