Seed Swaps

Perennial phlox      

Phlox paniculata

  • 287 plantings
  • 4 for swap
  • 24 wanted
  • 21 stashed

'Perennial phlox' is a plant in the Phlox genus with a scientific name of Phlox paniculata. The botanical name epithet for Perennial phlox (paniculata) means 'paniculate'.

Clump forming, with tall stiff stems and simple, sometimes variegated, oval leaves. The flowers are tubular at the base but form a five petaled simple flower, grouped together to form a dome at the top of each stem. Shades of pink and white, some striped or with darker eyes.
The flowers are long lasting on the plant, up to five weeks, and a mixture of varieties fill the border with colour and perfume from summer to the autumn frosts

Native to the eastern US.

Blooms typically mature to a diameter of 2.5 cm (0.97 inches imperial) and produce a honey-like fragrance, whilst displaying in these approximate colours:   Bright pink and   Floral white and   Fuchsia pink. The mature flowers take a single form, with an approximate petal count of 5. Leaves appear approximately as a   Kelly green and   Forest green (web)

Perennial phlox grows as a perennial and is a non-edible flower. Being a perennial plant, it tends to grow best over several years (approx 3 years and greater).

Perennial phlox is known for its erect habit and growing to a height of approximately 1.10 metres (3.57 feet). This plant tends to bloom in mid summer, followed by first harvests in mid autumn.

Try planting Perennial phlox if you'd like to attract butterflies and bees to your garden.

Popular varieties of Perennial phlox with home gardeners are David, Bright Eyes, Nicky, Blue Paradise and Starfire.

United States is believed to be where Perennial phlox originates from.

Perennial phlox is normally quite a low maintenance plant and is normally very easy to grow - great for beginner gardeners!

This plant info is provided by the myfolia gardener's wiki. All details about Perennial phlox have been kindly provided by our members.

How to grow Perennial phlox

  • Full Sun

  • Partial Sun

  • Medium

Phlox starts into growth in early spring and can be divided at this time. Keep the soil evenly moist to help prevent mildew. Some stems can be cut back to prolong the flowering season.
Cut back spent flower heads to encourage further buds and unwanted seedlings
Clumps can be divided in the autumn after flowering.
Dividing herbaceous perennials rejuvenates the plant, discard old woody matter from the centre of the clump

Plant in a location that enjoys full sun / partial sun and remember to water moderately. Zone 4 to 8 are typically the USDA Hardiness Zones that are appropriate for this plant (although this can vary based on your microclimate). Ideally plant in loamy and clay soil and try to keep the ph of your soil between the range of 6.1 and 7.8 as Perennial phlox likes to be in weakly acidic soil - weakly alkaline soil. Keep in mind when planting that Perennial phlox is thought of as very hardy, so this plant will tend to survive through freezing conditions.

See our list of companion Plants for Perennial phlox to see which plants you should plant in close proximity to encourage growth.

Growing Perennial phlox from seed

Direct sow outdoors in fall, or under a coldframe or unheated greenhouse in the winter. Requires a period of cold before germination
This can also be achieved by planting the seeds in a pot and after two to four weeks at 18 to 22C transfer to 4C for four to six weeks before returning warmer conditions but no more than 18C. If needed this cold cycle can be repeated if the seeds are still dormant
Much easier by dividing establishes clumps in the early spring or autumn.
Root cuttings will prevent the transmission of eelworm infestations found in the aerial parts of herbaceous phlox

Soil temperature should be kept higher than 15°C / 59°F to ensure good germination.

By our calculations*, you should look at sowing Perennial phlox about 14 days before your last frost date .

Transplanting Perennial phlox

Traditional cottage garden plant, great for borders place in the middle or towards the back.
Requires evenly moist soil in full sun.
Regular lifting and division of established clumps rejuvenates the plant, this can be done in spring or early autumn

Ensure that temperatures are mild and all chance of frost has passed before planting out, as Perennial phlox is a very hardy plant.

Harvesting Perennial phlox

Cut flowers for indoor display whenever you like. Use pruning shears or scissors for clean cut.

Seed Saving Perennial phlox

Phlox do not always come true from seed, phlox is more reliably propagated from root cuttings

How long does Perennial phlox take to grow?

These estimates for how long Perennial phlox takes to sprout, grow and harvest are from real observations from real gardeners, right around the world.

Start logging and journaling your observations to participate!

Days to Germination How long does it take Perennial phlox to germinate?
12 days

Average 12 days | Min 6 days | Max 139 days (4)

Days to Transplant How long until I can plant out Perennial phlox?
+ 26 days

Average 26 days | Min 26 days | Max 26 days (1)

Days to Maturity How long until Perennial phlox is ready for harvest / bloom?
+ 196 days

Average 196 days | Min 60 days | Max 1930 days (20)

Total Growing Days How long does it take to grow Perennial phlox?
= 234 days

When should I plant Perennial phlox?

Our when to plant Perennial phlox estimates are relative to your last frost date.

Enter your frost dates and we'll calculate your sowing and planting dates for you!

When to sow The number of days to sow Perennial phlox before or after your last frost date.
14 days before Last Frost Date

Perennial phlox Folklore & Trivia

Several old fashioned forms of Phlox paniculata are still available to grow today, Lilac Time from the 1940’s and 50’s is widely sold among the more modern cultivars

Other names for Perennial phlox

Garden Phlox, Phlox, Dwarf phlox, Border phlox

Phlox paniculata L.

Latest Perennial phlox Reviews


Perennial phlox Forums

No groups yet - why not start a new one?