Pleroma foveolatum

RHS Plant Profile

Organ Mountain glory bush

Synonyms

Tibouchina urvilleana 'Grandiflora'
Tibouchina grandiflora
Tibouchina organensis

Conservatory Greenhouse Shrubs

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A bushy, evergreen, hairy-stemmed shrub to 5m tall with ovate to oblong, green hairy leaves that may turn shades of red and orange with age. The saucer-shaped, bluish-purple flowers, each to 10cm or more in diameter, are borne in terminal clusters from summer into autumn

Position

Full sun

Soil Types

Chalk, Loam, Sand

Max Height

4-8 metres

Max Spread

2.5-4 metres

Size

Time to Maturity: 5–10 years
Max Spread: 2.5-4 metres
Max Height: 4-8 metres

Growing Conditions

Chalk Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing or East–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H1C

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Melastomataceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: A genus of evergreen flowering subshrubs, shrubs or trees, native to Puerto Rico and tropical South America, with dark green foliage, often edged with red. Showy, dark purple flowers with long white stamens appear in late spring to early summer
Name Status: Unresolved
Plant Range: SE Brazil

How to Grow

Cultivation

Under glass grow in peat-free, loam-based compost in full light with shade from hot sun. Water freely in summer but keep just moist in winter. Can be grown outdoors in moist, fertile, well drained soil in frost-free area

Propagation

Propagate by seed sown in spring or by softwood or semi-hardwood cuttings taken in late spring and summer, respectively

Suggested planting locations and garden types

Architectural
Mediterranean climate plants
City and courtyard gardens
Patio and container plants
Wall side borders

Pruning

Pruning group 9. Plants grown under glass may need restrictive pruning in late winter

Pests

May be susceptible to aphids, mealybugs and glasshouse whitefly

Diseases

May be susceptible to oedema under glass