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Herbaceous Perennial

Phlox paniculata Adessa Special Purple Star (Adessa Series)

perennial phlox [Adessa Special Purple Star]

An erect herbaceous perennial with dark-green lance-shaped foliage and terminal clusters of fragrant tubular violet-purple flowers with a white eye over a long period of time in summer.

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Chalk

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

East–facing or 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)

Botanical details

Family: Polemoniaceae
Native to GB / Ireland: No
Foliage: Deciduous
Habit: Columnar upright
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: Trade

How to grow

Cultivation

Will grow well in fertile moist but well-drained soil in full sun or partial shade. Apply fertilizer in Spring to promote growth or a thin layer of compost top dressing to add nutrients to the soil. Pinch back growing tips to promote bushiness.

Propagation

Propagate by division in autumn or spring, by basal cuttings in spring, or by a root cutting in early autumn or winter

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Wildlife gardens
Flower borders and beds
Wall side borders

Pruning

Deadhead to promote continous flowering and cut back to the base in late autumn or early winter

Pests

May be susceptible to stem and bulb eelworm

Diseases

May be susceptible to Powdery mildews, grey moulds and leafy gall

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