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Pentaglottis sempervirens (Green alkanet)
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1 hour care
per year
per year
1m
Max height
Max height
1m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Pentaglottis sempervirens
Other names
Green alkanet, Evergreen alkanet, Evergreen bugloss, Anchusa sempervirens
Genus
Pentaglottis Pentaglottis
Species
P. sempervirens - P. sempervirens is an upright, bristly, evergreen perennial with basal rosettes of ovate, pointed, mid-green leaves and erect, leafy stems bearing leafy clusters of bright blue flowers from spring to early summer.
Pentaglottis sempervirens is: Evergreen
Habit
Erect, Rosette
Flower
Bright-blue in Spring; Bright-blue in Summer
Foliage
Mid-green in All seasons
How to care
Watch out for
General care
Pruning
Deadhead regularly to prevent self-seeding.
Propagation methods
Seed, Division
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Where to grow
Pentaglottis sempervirens (Green alkanet) will reach a height of 1m and a spread of 1m after 2-5 years.
Suggested uses
Wildlife, Cottage/Informal, City, Bees (attract & feed bees), Beds and borders, Add to salads
Cultivation
Prefers moist, humus-rich soil in full or partial shade. Tolerates full sun. Site carefully as can be invasive. Roots are brittle and will sprout easily from any pieces left in the ground.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moisture-retentive
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Shade
Aspect
North, South, East, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Pentaglottis sempervirens
Other names
Green alkanet, Evergreen alkanet, Evergreen bugloss, Anchusa sempervirens
Genus
Pentaglottis Pentaglottis
Species
P. sempervirens - P. sempervirens is an upright, bristly, evergreen perennial with basal rosettes of ovate, pointed, mid-green leaves and erect, leafy stems bearing leafy clusters of bright blue flowers from spring to early summer.
Foliage
Evergreen
Habit
Erect, Rosette
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Colour
Flower
Bright-blue in Spring; Bright-blue in Summer
Foliage
Mid-green in All seasons
General care
Pruning
Deadhead regularly to prevent self-seeding.
Propagation methods
Seed, Division
Monthly care advice
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Where to grow
Pentaglottis sempervirens (Green alkanet) will reach a height of 1m and a spread of 1m after 2-5 years.
Suggested uses
Wildlife, Cottage/Informal, City, Bees (attract & feed bees), Beds and borders, Add to salads
Cultivation
Prefers moist, humus-rich soil in full or partial shade. Tolerates full sun. Site carefully as can be invasive. Roots are brittle and will sprout easily from any pieces left in the ground.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moisture-retentive
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Shade
Aspect
North, South, East, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 9, Zone 8, Zone 7
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, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moisture-retentive | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Shade | Tell us... |
| Aspect: | North, South, East, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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