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Phlox paniculata Starfire

Phlox paniculata Starfire
Garden Phlox, Summer Phlox, Perennial Phlox

3,9/5
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Françoise, 15/10/2024

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A true summer star: this Phlox bears stunning paniculate clusters of intense cherry red, pleasantly fragrant flowers. They renew themselves from July to September, or even longer, on an elegant young plant of medium habit, with foliage tinged with purple. In moist and fertile soil, it is an accommodating perennial, easy to cultivate. An award-winning variety in England.
Flower size
13 cm
Height at maturity
70 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to May, September to November
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Description

Phlox paniculata 'Starfire' is an ancient variety of phlox still highly appreciated by amateur and professional gardeners. This true star of flower gardens produces superb panicles of intense cherry red from summer to autumn.  These are pleasantly fragrant.  They crown an elegant plant of medium size, with astonishing purplish green foliage. In damp and fertile soil, it is an accommodating perennial, which is easy to grow, essential in flower beds and bouquets.  

 

Phlox paniculata 'Starfire' belongs to the family of Polemoniaceae. This ancient horticultural variety dating back to the 1960s is awarded the Award of Garden Merit year after year by the Royal Horticultural Society, which rewards the most performing plants. It is a woody perennial with a dense clump of leafy stems reaching about 70 cm (28in) in height and 40 cm (16in) in width. The stems, stiff and strong, are abundantly covered with dark but vivid green leaves, toothed at the edges, measuring 8-10 cm (3-4in) in length. Flowering begins in mid-July, at the height of summer, and continues until September, or even October if the weather remains mild, provided that faded inflorescences are removed. The small flowers have a tubular corolla, cherry red in colour, with a barely visible red throat. They are grouped at the end of the erect, dense and pyramidal stems, 10-15 cm (4-6in) in length, with a sweet and spicy fragrance. Their weight slightly curves the stems. The flowering is melliferous and nectariferous.

  

Loaded with flowers and often fragrant, Phlox are perennial plants made for cottage gardens.  Their simplicity and generosity are almost unmatched in perennial beds.  'Starfire' works well with Heucherella ('Solar Power'), Monarda 'Mohawk', Daisies, and all silver or purple foliage. It can also be combined with gauras, cleomes, but also with perennial delphiniums that appreciate the same conditions. Tall phlox make good companions for shrub roses, harmonising well in colour.  Phlox paniculata 'Starfire' is a first-class perennial for flower beds in summer and for bouquets at home.    

Phlox paniculata Starfire in pictures

Phlox paniculata Starfire (Flowering) Flowering
Phlox paniculata Starfire (Foliage) Foliage
Phlox paniculata Starfire (Plant habit) Plant habit

Flowering

Flower colour red
Flowering time July to September
Inflorescence Panicle
Flower size 13 cm
Fragrance Fragrant, Floral
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour purple

Plant habit

Height at maturity 70 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Phlox

Species

paniculata

Cultivar

Starfire

Family

Polemoniaceae

Other common names

Garden Phlox, Summer Phlox, Perennial Phlox

Origin

Cultivar or hybrid

Product reference8515111

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Planting and care

Phlox paniculata are easy to grow. Phlox Starfire will prefer a damp and rich soil, even clay which is well-drained. It needs sun to flower well. Planted in the sun in a climate with hot summers, it will require regular watering and mulching at the base. Pruning the faded inflorescences promotes a second flowering at the end of the season. Protect young plants from slugs, which are fond of their tender shoots.

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Planting period

Best planting time March, October
Recommended planting time February to May, September to November

Intended location

Suitable for Meadow
Type of use Border
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Beginner
Planting density 7 per m2
Exposure Sun
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, Deep, friable, fertile

Care

Pruning instructions To encourage reblooming, regularly prune the faded flowers. Cut back the dried vegetation at the end of the season, in November.
Pruning Pruning recommended once a year
Pruning time July to August, November
Disease resistance Good
Overwinter Can be left in the ground
3,9/5

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