Phlox paniculata
perennial phlox
An upright perennial to 1.2m high with stems carrying broadly lance-shaped, slightly toothed leaves. Pink, purple or white flat-faced flowers, often strongly scented, are grouped in domed clusters and borne atop the leafy stems from mid- to late summer
Other common names
autumn phloxcross-leaved phlox
see morefall phlox
summer perennial phlox
summer phlox
tall garden phlox
Size
Ultimate height
1–1.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Pink Purple White | Green | ||
| Autumn | Pink Purple White | Green | ||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or West–facing or East–facing
Exposure
Exposed or Sheltered Hardiness
H7Botanical details
- Family
- Polemoniaceae
- Native to the UK
- No
- Foliage
- Deciduous
- Habit
- Clump forming
- 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
Correct
- Plant range
- Eastern USA
How to grow
Cultivation
Grow in average to rich, evenly-moist soil in full sun or light shade
Propagation
Propagate by division in autumn or spring, by basal cuttings in spring or by root cuttings in early autumn or winter
Suggested planting locations and garden types
- City and courtyard gardens
- Cottage and informal garden
- Cut flowers
- Flower borders and beds
Pruning
Deadhead to prolong flowering then cut down to the base in late autumn
Pests
May be susceptible to phlox eelworm
Diseases
May be susceptible to powdery mildews, grey moulds, leafy gall and leaf spot
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.