Primula 'Iris Mainwaring' (Pr/Prim) | primrose 'Iris Mainwaring'

Synonyms

Primula juliae 'Iris Mainwaring'
Primula vulgaris 'Iris Mainwaring'

Herbaceous Perennial

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'Iris Mainwaring' is a compact, rosette-forming, semi-evergreen Primrose group primula up to 15cm, with oval, deep green leaves to 18cm long. Delicate pink flowers, 4cm across, with yellow centres, are produced in small clusters in spring

Position

Full sun, 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

Full sun Partial shade

Aspect: South–facing or East–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): H7

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Primulaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Clump forming
Potentially harmful: Harmful if eaten. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
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: Primrose group primulas are mainly grown as herbaceous perennials, and produce clusters of flowers on individual stems from the basal rosettes, although a few may also have umbel-like flowers. They are either spring-flowering, if grown without protection, or winter- to spring-flowering, if grown as biennial container plants in greenhouses or indoors.

How to Grow

Cultivation

Grow in full sun or partial shade in moderately fertile, moist but well-drained, humus-rich-soil. May also be grown under glass in an alpine house or cold frame in a mix of equal parts peat-free, loam-based potting compost, leaf mould or peat-substitute and grit. See primula cultivation

Propagation

Propagate by division in autumn or early spring

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Patio and container plants
Rock garden
Low Maintenance
Banks and slopes
Flower borders and beds
Underplanting of roses and shrubs

Pruning

No pruning required

Pests

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

Diseases

May be susceptible to primula brown core and grey moulds