Phlox douglasii 'Red Admiral'
phlox 'Red Admiral'
'Red Admiral' is a compact evergreen perennial to 15cm in height, forming a mat of small, dark green, awl-shaped leaves. Flowers rich deep crimson, 1.5cm in width, 1-3 at the ends of the stems, in late spring and early summer
Size
Ultimate height
0.1–0.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Red | Green | ||
|---|---|---|---|---|
| Summer | Red | Green | ||
| Autumn | Green | |||
| Winter | Green |
Position
- Full sun
- Partial shade
Aspect
South–facing or East–facing
Exposure
Exposed Hardiness
H6Botanical details
- Family
- Polemoniaceae
- Native to the UK
- No
- Foliage
- Evergreen
- Habit
- Matforming
- 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
Accepted
How to grow
Cultivation
Grow in well-drained, fertile soil in full sun or partial shade
Propagation
Propagate by taking softwood cuttings of non-flowering stems in spring
Suggested planting locations and garden types
- Cottage and informal garden
- Rock garden
- Gravel garden
- Patio and container plants
- Garden edging
Pruning
Deadhead to prolong flowering
Pests
Generally pest-free
Diseases
May be susceptible to powdery mildews and a 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.