Phlox subulata 'Emerald Cushion'

RHS Plant Profile

moss phlox 'Emerald Cushion'

Synonyms

Phlox subulata 'Emerald Pink'
Phlox subulata 'Emerald Cushion Pink'

Alpine Rockery Herbaceous Perennial

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A spreading, mound-forming, evergreen perennial to 15cm tall, with linear, bright green leaves and, from late spring to early summer, pale violet flowers, to 2.5cm across, with notched petal apices

Position

Full sun

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: Well–drained
pH: Alkaline or Neutral

Position

Full sun

Aspect: South–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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Polemoniaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Matforming
Genus: Phlox may be evergreen or herbaceous, mat-forming or erect perennials or shrubs, with simple leaves and salver-shaped flowers in terminal clusters
Name Status: Accepted

How to Grow

Cultivation

Grow in fertile, moist soil in full sun or partial shade. See phlox cultivation for further advice

Propagation

Propagate by seed in a cold frame when ripe or in spring. Propagate by softwood cuttings or non-flowering stems in spring

Suggested planting locations and garden types

Cottage and informal garden
Gravel garden
City and courtyard gardens
Patio and container plants
Rock garden
Garden edging

Pruning

No pruning required

Pests

Phlox eelworm may be a problem

Diseases

Powdery mildews and leaf spot may be a problem