Roscoea humeana 'Stephanie Bloom'

RHS Plant Profile

Hume roscoea 'Stephanie Bloom'

Other common names

cautleya-flowered roscoea 'Stephanie Bloom'

Synonyms

Roscoea cautleyoides 'Stephanie Bloom'

Herbaceous Perennial

Buy this from Plant Nurseries
2 Suppliers

A tuberous perennial, to about 30cm tall, with broad, green, fleshy, upright leaves clasping the stem. Rich, magenta-purple orchid-like flowers are produced in small, terminal clusters from late spring to midsummer

Position

Partial shade

Soil Types

Clay, Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Clay Loam

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

Position

Partial shade

Aspect: North–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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Zingiberaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming, Columnar upright
Genus: Roscoea are tuberous perennials with arching, linear or lance-shaped leaves and showy orchid-like flowers in summer or autumn
Name Status: Accepted

How to Grow

Cultivation

Grow in humus-rich, moderately fertile, moist but well-drained soil. A cool, sheltered site in partial shade is ideal; in very cold areas apply a deep winter mulch. If growing from a tuber, plant 15cm deep

Propagation

Propagate by seed in pots in a cold frame as soon as seed is ripe, or by division of tubers in spring

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
Rock garden
Flower borders and beds
Underplanting of roses and shrubs

Pruning

Remove faded flowers, the rest of the plant will die down naturally

Pests

May be susceptible to slugs and vine weevils

Diseases

Generally disease-free