Primula allionii (Au) | Allioni's primrose

RHS 1985

Synonyms

Primula glutinosa All.

Alpine Rockery Herbaceous Perennial

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A small evergreen perennial forming rosettes of oblanceolate greyish-green leaves, with up to five white to pink flowers, usually white-eyed, 3cm across, borne in umbels on short erect scapes from late winter

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0-0.1 metre

Size

Time to Maturity: 2–5 years
Max Spread: 0-0.1 metre
Max Height: Up to 10 cm

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Alkaline

Position

Full sun Partial shade

Aspect: South–facing or East–facing
Exposure: Exposed
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: 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: Correct
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
Plant Range: European Alps

How to Grow

Cultivation

Grow in pots in an alpine house or frame. Use an alpine compost based on loam with added lime. Avoid wetting the foliage

Propagation

Propagate by seed sown in pots in an open frame as soon as ripe or in late winter to early spring. Propagate by detaching offsets in autumn or early spring

Suggested planting locations and garden types

Patio and container plants

Pruning

Deadhead after flowering

Pests

May be susceptible to aphids, glasshouse red spider mite, slugs, leafhoppers and vineweevils

Diseases

May be susceptible to a virus, primula brown core and grey moulds