Roscoea humeana f. tyria

Synonyms

Roscoea cautleyoides f. tyrium

Herbaceous Perennial

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A tuberous perennial to 40cm tall, with lance-shaped leaves. In summer it bears dark purple flowers to 6cm across

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

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

Chalk Clay Loam Sand

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

Position

Partial shade

Aspect: East–facing or North–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: Tufted
Genus: Roscoea are tuberous perennials with arching, linear or lance-shaped leaves and showy orchid-like flowers in summer or autumn
Name Status: Correct

How to Grow

Cultivation

Plant tubers 15cm deep in winter or early spring. Grow in moderately fertile, humus-rich, moist but well drained soil in a cool, sheltered site in partial shade

Propagation

Propagate by sowing seed in containers in a cold frame as soon as ripe. Divide in spring

Suggested planting locations and garden types

Cottage and informal garden
Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs and vine weevil

Diseases

Generally disease-free