Primula marginata 'Caerulea' (Au)

Conservatory Greenhouse Alpine Rockery Herbaceous Perennial

Buy this from Plant Nurseries
4 Suppliers

A compact, vigorous rosette-forming, evergreen perennial with neat, pale green, toothed foliage with a silvery coating, and small, fragrant, slightly frilled, funnel-shaped purple-blue flowers which appear in mid-winter to early spring

Position

Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0-0.1 metre

Size

Time to Maturity: 2–5 years
Max Spread: 0-0.1 metre
Max Height: 0.1-0.5 metres

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

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Primulaceae
Native to GB/Ireland: No
Foliage: Evergreen
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: Auricula section primulas are evergreen perennials with leathery, often farinose foliage and simple umbels of salver-shaped flowers which are usually pink, purple or yellow

How to Grow

Cultivation

Grow in partial shade in moderately fertile, moist but well-drained, humus-rich soil. May also be grown in an alpine house or greenhouse/conservatory using a specialist alpine plant compost based on loam with added lime. Avoid wetting the foliage

Propagation

Propagate by seed when ripe, division or by separating and rooting offsets in autumn or early spring

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
Rock garden
Flower borders and beds
Conservatory and greenhouse

Pruning

No pruning required

Pests

May be susceptible to aphids, vine weevil, slugs, leaf and bud eelworms, leaf-mining flies and glasshouse red spider mite

Diseases

May be susceptible to primula leaf spot, primula brown core and grey moulds