Calceolaria integrifolia

RHS Plant Profile

slipperwort

Dorling Kindersley 2003

Synonyms

Calceolaria rugosa
Calceolaria stewartii hort.

Bedding Herbaceous Perennial

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A small, bushy, upright evergreen sub-shrub. Leaves 5-8cm in length, ovate or oblong, dull green and veiny above, hairy beneath. Flowers 12mm width, bright yellow, in large corymbs to 12cm in width

Position

Full sun, Partial shade

Soil Types

Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 5–10 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Clay Loam Sand

Moisture: Moist but well–drained or Poorly–drained
pH: Acid

Position

Full sun Partial shade

Aspect: South–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): H2

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Calceolariaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Calceolaria can be annuals, biennials, perennials or shrubs, with opposite leaves or basal rosettes, and solitary or clustered, slipper-like yellow, red or purple flowers
Name Status: Correct
Plant Range: Chile

How to Grow

Cultivation

Grow as summer bedding or plant in a container, flowers best in cool, moist conditions, likes acid soil or compost in sun or partial shade

Propagation

Propagate by seed or softwood cuttings taken in late summer

Suggested planting locations and garden types

Patio and container plants
City and courtyard gardens
Cottage and informal garden
Flower borders and beds

Pruning

Deadhead regularly

Pests

May be susceptible to slugs and snails

Diseases

Generally disease-free