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Ceanothus thyrsiflorus 'Cool Blue' (Blue blossom 'Cool Blue')
1 hour care
per year
per year
1.2m
Max height
Max height
1.5m
Max spread
Max spread
10-20 years
To maturity
To maturity
Plant details
Botanical name
Ceanothus thyrsiflorus 'Cool Blue'
Other names
Blue blossom 'Cool Blue', Blueblossom 'Cool Blue', California lilac 'Cool Blue', Californian lilac 'Cool Blue', Blue brush 'Cool Blue', Bluebrush 'Cool Blue', Ceanothus thyrsiflorus 'Huico02', Ceanothus impressus 'Cool Blue'
Genus
Ceanothus Ceanothus
Variety or Cultivar
'Cool Blue' _ 'Cool Blue' is a vigorous yet tender, upright, evergreen shrub bearing small, oblong to ovate, glossy, toothed and veined, dark green leaves with creamy-white margins and spherical panicles of fragrant, violet-blue flowers from mid-spring to early summer.
Ceanothus thyrsiflorus 'Cool Blue' is: Evergreen
Habit
Rounded, Upright
Flower
Blue, Violet in Spring
Foliage
Dark-green, Variegated, Cream 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 after flowering. Mulch and feed after pruning.
Propagation methods
Semi-hardwood cuttings, Semi-ripe cuttings
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Where to grow
Ceanothus thyrsiflorus 'Cool Blue' (Blue blossom 'Cool Blue') will reach a height of 1.2m and a spread of 1.5m after 10-20 years.
Suggested uses
City, Wallside and trellises
Cultivation
Plant in well-drained soil in a sheltered site. Tolerates full sun in coastal locations but needs afternoon shade in warm, dry areas. Water regularly in dry periods. Tolerates clay and moderate drought.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Alkaline, Neutral
Light
Partial Shade, 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 thyrsiflorus 'Cool Blue'
Other names
Blue blossom 'Cool Blue', Blueblossom 'Cool Blue', California lilac 'Cool Blue', Californian lilac 'Cool Blue', Blue brush 'Cool Blue', Bluebrush 'Cool Blue', Ceanothus thyrsiflorus 'Huico02', Ceanothus impressus 'Cool Blue'
Genus
Ceanothus Ceanothus
Variety or Cultivar
'Cool Blue' _ 'Cool Blue' is a vigorous yet tender, upright, evergreen shrub bearing small, oblong to ovate, glossy, toothed and veined, dark green leaves with creamy-white margins and spherical panicles of fragrant, violet-blue flowers from mid-spring to early summer.
Native to
Garden origin
Foliage
Evergreen
Habit
Rounded, Upright
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Colour
Flower
Blue, Violet in Spring
Foliage
Dark-green, Variegated, Cream in All seasons
How to care
Watch out for
Specific pests
Specific diseases
Honey fungus , Phytophthora root diseases
General care
Pruning
Pruning group 8 after flowering. Mulch and feed after pruning.
Propagation methods
Semi-hardwood cuttings, Semi-ripe cuttings
Monthly care advice
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Where to grow
Ceanothus thyrsiflorus 'Cool Blue' (Blue blossom 'Cool Blue') will reach a height of 1.2m and a spread of 1.5m after 10-20 years.
Suggested uses
City, Wallside and trellises
Cultivation
Plant in well-drained soil in a sheltered site. Tolerates full sun in coastal locations but needs afternoon shade in warm, dry areas. Water regularly in dry periods. Tolerates clay and moderate drought.
Soil type
Chalky, Loamy, Sandy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Alkaline, Neutral
Light
Partial Shade, 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: | Partial Shade, 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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