Phlox paniculata ‘Orchid Yellow’ graces sunny borders, flower beds and large flowering borders. Its unusual colour blends with white or pink blooms and anise-green foliage. You can associate it with pastel yarrows (Achillea millefolium 'Schneetaler', ‘Appleblossom’), pink summer asters (Aster amellus ‘Rosa Erfüllung’), white coneflowers 'Virgin' and fennel, for example. It can also be combined with light grasses, such as Pennisetum, to create movement and soften lines. Superb in a large pot, it enlivens terraces and patios. Its cut flowers are remarkable in rustic or romantic bouquets.
Phlox paniculata Orchid Yellow
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Phlox paniculata Orchid Yellow
Phlox paniculata Orchid Yellow
Garden Phlox, Summer Phlox, Perennial Phlox
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Variety of about 70 cm in height, this phlox stands out for its large panicles of bright pink flowers edged with yellowish green. Its fragrant flowering begins in July and continues until early autumn. This perennial thrives in full sun in fertile, well-drained, moist soil. Use it in a flower bed, in large pots, or for making original cut flower arrangements.
Flower size
18 cm
Height at maturity
70 cm
Spread at maturity
50 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
March to May, September to November
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Flowering time
July to October
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Description
Phlox paniculata ‘Orchid Yellow’ is a fresh and original summer perennial. This particularly floriferous variety produces large panicles of pink flowers edged with a yellow tinged with anise green. Its long-lasting, fragrant flowering attracts many pollinators throughout the summer. This variety also allows creates large colourful cut flower arrangements.
Phlox ‘Orchid Yellow’ belongs to the Polemoniaceae family; it is part of the panicled phlox or garden phlox. This selected cultivar is derived from the wild species Phlox paniculata, native to eastern and east‑central United States. This perennial plant emerges from the ground every spring after a period of winter dormancy. 'Orchid Yellow’ offers a very unusual colouring, larger and denser panicles and excellent vase life. Moreover, it proves to be less susceptible to foliar diseases when grown in full sun with sufficient air circulation.
This cultivar has a decidedly erect and bushy habit; the plant forms a dense clump of about 70 cm in height and a spread of 50 cm after 2 to 3 years. From July to early September (autumn depending on climate), it produces large pyramidal panicles measuring 15–18 cm in diameter, formed of many small, 2 to 2.5 cm in diameter flowers. Each flower consists of a tube ending in five rounded lobes of bright pink or fuchsia with edges from chartreuse to greenish yellow. A small, almost black throat gives relief to each corolla. The nectariferous flowers with a soft, sweet scent attract bees, butterflies and other pollinators. The foliage is arranged oppositely along the stems, the leaves are lanceolate to ovate, usually 5 to 12 cm long, bright green to dark green with a glossy surface. The foliage emerges in spring, then dies back in autumn.
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Family sheet
Modified the 6 August 2025
by Alexandra
17 min.
Phlox: planting, growing and care
Read article
<strong>Phlox</strong> are <strong>perennial plants</strong> or annuals with a generous star-shaped flowering. Their form can vary greatly depending on the species: dwarf moss phlox have a creeping habit (Phlox subulata, P. douglasii) and sometimes form beautiful ground covers, while the larger varieties have an upright habit (Phlox paniculata) and are best suited for borders. <strong>Phlox produce a multitude of star-shaped flowers in spring or summer,</strong> often in shades of pink, blue, white, red, or mauve... Their hues can be soft, pastel, or quite vibrant. They are generally perennials, but there are annual species, such as Drummond's phlox, <em>Phlox drummondii</em>. The most popular are undoubtedly the paniculate phlox, which come in many horticultural varieties.
These are <strong>fairly robust and easy to grow plants</strong>. They should be planted in spring, <strong>in full sun or partial shade.</strong> As for maintenance, paniculate phlox will appreciate regular watering in summer, and they should be cut back at the end of autumn. It is also advisable to remove faded flowers, as this prolongs the flowering period. They can be propagated by division or sowing... It is even recommended to divide them, on average every four years, to rejuvenate the clumps, which can otherwise become exhausted.
Many varieties offer pleasantly scented flowers. And the flowers of upright phlox (notably paniculate phlox) are perfect for creating bouquets!
Flowering
Flower colour
two-tone
Flowering time
July to October
Inflorescence
Panicle
Flower size
18 cm
Fragrance
Fragrant Flowery
Bee-friendly
Attracts pollinators
Good for cut flowers
Cut flower blooms
Foliage
Foliage persistence
Deciduous
Foliage colour
medium green
Plant habit
Height at maturity
70 cm
Spread at maturity
50 cm
Growth rate
normal
Botanical data
Genus
Phlox
Species
paniculata
Cultivar
Orchid Yellow
Family
Polemoniaceae
Other common names
Garden Phlox, Summer Phlox, Perennial Phlox
Botanical synonyms
Phlox paniculata Orchid Yellow
Origin
Cultivar or hybrid
Product reference
•
24826
Planting and care
Plant Phlox paniculata 'Orchid Yellow' in full sun. Phlox are most at home in a cool climate in summer, particularly at night. Choose a rich, well-drained soil that you have deeply loosened. Phlox paniculata does not like root competition from other plants. This perennial does not tolerate drought. Stake if necessary, as the stems may bend under the weight of the leaves. Deadhead faded flowers to prolong flowering. Phlox is susceptible to powdery mildew; take preventive measures by watering regularly in summer and monitor for its possible appearance for early treatment.
Planting period
Best planting time
March, October
Recommended planting time
March to May, September to November
Intended location
Suitable for
Meadow
Type of use
Border, Edge of border, Cut flowers, Container
Hardiness
Hardy down to -29°C (USDA zone 5)
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Ease of cultivation
Amateur
Planting density
7 per m2
Exposure
Sun
Soil pH
Acidic, Neutral
Soil type
Clayey (heavy), Silty-loamy (rich and light)
Soil moisture
Moist soil rich, light and moist
Care
Pruning instructions
To encourage repeat flowering, regularly prune the faded flowers. Phlox self-seeds in the garden, not always true to type. 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
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.