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Persicaria vacciniifolia (Rock knotweed)
1 hour care
per year
per year
0.2m
Max height
Max height
1.5m
Max spread
Max spread
5-10 years
To maturity
To maturity
Plant details
Botanical name
Persicaria vacciniifolia
Other names
Rock knotweed, Whortleberry-leaved knotweed, Polygonum vacciniifolium
Genus
Persicaria Persicaria
Species
P. vacciniifolia - P. vacciniifolia is a ground covering perennial, with foliage that turns red in autumn, and narrow spikes of deep pink flowers in late summer and early autumn.
Persicaria vacciniifolia is: Semi evergreen
Habit
Creeping, Mat Forming
Awards
RHS AGM (Award of Garden Merit)
Flower
Pale-pink in Summer; Pale-pink in Autumn
Foliage
Green in Summer; Brown in Autumn; Brown in Winter
How to care
Watch out for
Pests
Generally pest-free.
Diseases
Generally disease-free.
General care
Pruning
Cut the plant back after flowering has finished
Propagation methods
Division
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Where to grow
Persicaria vacciniifolia (Rock knotweed) will reach a height of 0.2m and a spread of 1.5m after 5-10 years.
Suggested uses
Beds and borders, Cottage/Informal, Ground Cover, Low Maintenance, Rock
Cultivation
Plant in any moist soil in sun or partial shade.
Soil type
Clay, Loamy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
North, South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
Botanical name
Persicaria vacciniifolia
Other names
Rock knotweed, Whortleberry-leaved knotweed, Polygonum vacciniifolium
Genus
Persicaria Persicaria
Species
P. vacciniifolia - P. vacciniifolia is a ground covering perennial, with foliage that turns red in autumn, and narrow spikes of deep pink flowers in late summer and early autumn.
Foliage
Semi evergreen
Habit
Creeping, Mat Forming
Awards
RHS AGM (Award of Garden Merit)
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Colour
Flower
Pale-pink in Summer; Pale-pink in Autumn
Foliage
Green in Summer; Brown in Autumn; Brown in Winter
How to care
Watch out for
Pests
Generally pest-free.
Diseases
Generally disease-free.
General care
Pruning
Cut the plant back after flowering has finished
Propagation methods
Division
Monthly care advice
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Where to grow
Persicaria vacciniifolia (Rock knotweed) will reach a height of 0.2m and a spread of 1.5m after 5-10 years.
Suggested uses
Beds and borders, Cottage/Informal, Ground Cover, Low Maintenance, Rock
Cultivation
Plant in any moist soil in sun or partial shade.
Soil type
Clay, Loamy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
North, South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 8, Zone 7, Zone 6, Zone 5
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Clay, Loamy | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | North, South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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By Argyll and Bute based garden designer Rachel Bailey. A coastal garden in West Scotland that settles the garden into the wider landscape of the Cowal Peninsula and the Kyle of Bute.… read more
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