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Phlox '21st Century Blue' (21st Century Series) (Annual phlox '21st Century Blue')
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1 hour care
per year
per year
0.25m
Max height
Max height
0.3m
Max spread
Max spread
1-2 years
To maturity
To maturity
Plant details
Botanical name
Phlox '21st Century Blue' (21st Century Series)
Other names
Annual phlox '21st Century Blue', Drummond's phlox '21st Century Blue', Texas pride '21st Century Blue', Texan pride '21st Century Blue', Phlox drummondii '21st Century Blue'
Genus
Phlox Phlox
Variety or Cultivar
'21st Century Blue' _ '21st Century Blue' is a tender, upright annual with narrowly ovate to lance-shaped, dark green leaves and terminal clusters of salver-shaped, deep purple-blue flowers from summer until first frosts.
Phlox '21st Century Blue' (21st Century Series) is: Deciduous
Habit
Upright, Compact
Flower
Blue, Purple in Summer; Blue, Purple in Autumn
Foliage
Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
How to care
Watch out for
Specific pests
Phlox eelworm Phlox eelworm
Leaf spot , Powdery mildew Leaf spot , Powdery mildew
General care
Pruning
Deadhead regularly. Cut back after flowering.
Propagation methods
Seed
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Where to grow
Phlox '21st Century Blue' (21st Century Series) (Annual phlox '21st Century Blue') will reach a height of 0.25m and a spread of 0.3m after 1-2 years.
Suggested uses
Beds and borders, Containers, Cottage/Informal
Cultivation
Grow in fertile, well-drained soil in sun. Plant after danger of frost has passed.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, East
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Tender in frost (H3)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Phlox '21st Century Blue' (21st Century Series)
Other names
Annual phlox '21st Century Blue', Drummond's phlox '21st Century Blue', Texas pride '21st Century Blue', Texan pride '21st Century Blue', Phlox drummondii '21st Century Blue'
Genus
Phlox Phlox
Variety or Cultivar
'21st Century Blue' _ '21st Century Blue' is a tender, upright annual with narrowly ovate to lance-shaped, dark green leaves and terminal clusters of salver-shaped, deep purple-blue flowers from summer until first frosts.
Native to
Garden origin
Foliage
Deciduous
Habit
Upright, Compact
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Colour
Flower
Blue, Purple in Summer; Blue, Purple in Autumn
Foliage
Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn
How to care
Watch out for
Specific pests
Specific diseases
General care
Pruning
Deadhead regularly. Cut back after flowering.
Propagation methods
Seed
Monthly care advice
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Where to grow
Phlox '21st Century Blue' (21st Century Series) (Annual phlox '21st Century Blue') will reach a height of 0.25m and a spread of 0.3m after 1-2 years.
Suggested uses
Beds and borders, Containers, Cottage/Informal
Cultivation
Grow in fertile, well-drained soil in sun. Plant after danger of frost has passed.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, East
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Tender in frost (H3)
USDA zones
Zone 10, Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Chalky, Loamy, Sandy | Tell us... |
| Soil drainage: | Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, East | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Tender in frost (H3) | Tell us... |
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