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Ceanothus 'Cynthia Postan' (Californian lilac 'Cynthia Postan')
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1 hour care
per year
per year
2.5m
Max height
Max height
2.5m
Max spread
Max spread
5-10 years
To maturity
To maturity
Plant details
Botanical name
Ceanothus 'Cynthia Postan'
Other names
Californian lilac 'Cynthia Postan', California lilac 'Cynthia Postan'
Genus
Ceanothus Ceanothus
Variety or Cultivar
'Cynthia Postan' _ 'Cynthia Postan' is a dense, rounded, evergreen shrub with narrowly elliptic, veined, glossy, dark green leaves and dense panicles of deep blue flowers in late spring and early summer.
Ceanothus 'Cynthia Postan' is: Evergreen
Habit
Dense, Rounded
Flower
Blue in Spring; Blue in Summer
Foliage
Dark-green in All seasons
How to care
Watch out for
Specific pests
Scale insects Scale insects
Honey fungus , Phytophthora root diseases Honey fungus , Phytophthora root diseases
General care
Pruning
Pruning group 8. Pruning group 13 if wall-trained.
Propagation methods
Semi-ripe cuttings
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Where to grow
Ceanothus 'Cynthia Postan' (Californian lilac 'Cynthia Postan') will reach a height of 2.5m and a spread of 2.5m after 5-10 years.
Suggested uses
Banks and Slopes, Beds and borders, City, Coastal, Cottage/Informal, Drought Tolerant, Gravel, Mediterranean, Wallside and trellises
Cultivation
Plant in fertile, well-drained soil in a sheltered, sunny site. Protect from cold, drying winds in winter. Drought tolerance once established. Tolerates slightly alkaline conditions but will be chlorotic on shallow chalk.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Alkaline, Neutral
Light
Full Sun
Aspect
South, East, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4), Tender in frost (H3)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Ceanothus 'Cynthia Postan'
Other names
Californian lilac 'Cynthia Postan', California lilac 'Cynthia Postan'
Genus
Ceanothus Ceanothus
Variety or Cultivar
'Cynthia Postan' _ 'Cynthia Postan' is a dense, rounded, evergreen shrub with narrowly elliptic, veined, glossy, dark green leaves and dense panicles of deep blue flowers in late spring and early summer.
Native to
Garden origin
Foliage
Evergreen
Habit
Dense, Rounded
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Colour
Flower
Blue in Spring; Blue in Summer
Foliage
Dark-green in All seasons
How to care
Watch out for
Specific pests
Specific diseases
Honey fungus , Phytophthora root diseases
General care
Pruning
Pruning group 8. Pruning group 13 if wall-trained.
Propagation methods
Semi-ripe cuttings
Monthly care advice
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Where to grow
Ceanothus 'Cynthia Postan' (Californian lilac 'Cynthia Postan') will reach a height of 2.5m and a spread of 2.5m after 5-10 years.
Suggested uses
Banks and Slopes, Beds and borders, City, Coastal, Cottage/Informal, Drought Tolerant, Gravel, Mediterranean, Wallside and trellises
Cultivation
Plant in fertile, well-drained soil in a sheltered, sunny site. Protect from cold, drying winds in winter. Drought tolerance once established. Tolerates slightly alkaline conditions but will be chlorotic on shallow chalk.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Alkaline, Neutral
Light
Full Sun
Aspect
South, East, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4), Tender in frost (H3)
USDA zones
Zone 10, Zone 9, Zone 8
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: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, East, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Hardy (H4), Tender in frost (H3) | Tell us... |
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