Primula 'Johanna' (Pu)

Alpine Rockery Herbaceous Perennial

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A compact, clump-forming, deciduous perennial with green, toothed foliage, emerging bronze in the spring. Rosy-pink flowers with white centres and a yellow eye appear on short stems in spring

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: Up to 10 cm

Growing Conditions

Chalk Clay Loam Sand

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

Position

Partial shade

Aspect: East–facing or North–facing or West–facing
Exposure: Exposed or 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

Botanical Details

Family: Primulaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Primula are herbaceous or semi-evergreen perennials, forming a basal rosette of simple leaves, with salver-shaped or bell-shaped flowers which may be solitary or carried in an umbel or in whorls on an erect stem
Name Status: Accepted
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: Pulchellae primulas are short-lived with narrow, lance-shaped dark green, slightly glossy foliage with a thick yellow-green mealy coating beneath. Flowers are dark to purple-blue with a greenish-yellow eye

How to Grow

Cultivation

Grow in partial shade in moderately fertile, moist but well-drained, humus-rich soil

Propagation

Propagate by division in autumn or after flowering

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Rock garden
Flower borders and beds

Pruning

No pruning required. Remove dead or damaged leaves after flowering

Pests

May be susceptible to aphids

Diseases

May be susceptible to grey moulds (botrytis)