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Physostegia leptophylla (Slenderleaf false dragonhead)
1 hour care
per year
per year
0.9m
Max height
Max height
0.75m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Physostegia leptophylla
Other names
Slenderleaf false dragonhead, False dragonhead, Swamp obedient plant, Tidal marsh obedient plant, Narrowleaf dragonhead, Correll's false dragon's head, Dracocephalum leptophyllum, Dracocephalum veroniciforme, Physostegia veroniciformis, Water obedient plant, Lavender bells
Genus
Physostegia Physostegia
Species
P. leptophylla - P. leptophylla is an erect, marginal aquatic, deciduous perennial with square stems bearing elliptic to narrowly lance-shaped, mid- to dark green leaves and racemes of tubular, two-lipped, lavender to lavender-pink flowers from late spring or early summer into autumn.
Physostegia leptophylla is: Deciduous
Habit
Erect
Flower
Lavender, Purple-pink in Summer; Purple-pink, Lavender in Autumn
Foliage
Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn
How to care
Watch out for
Pests
Generally pest-free
Diseases
May be subject to rot if rhizomes are damaged.
General care
Pruning
Cut to the ground in winter.
Propagation
Sow seed in a cold frame in autumn. Keep moist. Divide in late winter or early spring.
Propagation methods
Division, Seed
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Where to grow
Physostegia leptophylla (Slenderleaf false dragonhead) will reach a height of 0.9m and a spread of 0.75m after 2-5 years.
Suggested uses
Bog garden, Containers, Waterside, Wildlife
Cultivation
Grow in wet or boggy soil or in water up to 10cm deep. Prefers full sun but easily tolerates partial shade. Found at river swamp openings and in the margins of both freshwater and brackish tidal marshes.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Moisture-retentive
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, 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
Physostegia leptophylla
Other names
Slenderleaf false dragonhead, False dragonhead, Swamp obedient plant, Tidal marsh obedient plant, Narrowleaf dragonhead, Correll's false dragon's head, Dracocephalum leptophyllum, Dracocephalum veroniciforme, Physostegia veroniciformis, Water obedient plant, Lavender bells
Genus
Physostegia Physostegia
Species
P. leptophylla - P. leptophylla is an erect, marginal aquatic, deciduous perennial with square stems bearing elliptic to narrowly lance-shaped, mid- to dark green leaves and racemes of tubular, two-lipped, lavender to lavender-pink flowers from late spring or early summer into autumn.
Native to
Southeastern United States
Foliage
Deciduous
Habit
Erect
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Colour
Flower
Lavender, Purple-pink in Summer; Purple-pink, Lavender in Autumn
Foliage
Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn
How to care
Watch out for
Pests
Generally pest-free
Diseases
May be subject to rot if rhizomes are damaged.
General care
Pruning
Cut to the ground in winter.
Propagation
Sow seed in a cold frame in autumn. Keep moist. Divide in late winter or early spring.
Propagation methods
Division, Seed
Monthly care advice
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Where to grow
Physostegia leptophylla (Slenderleaf false dragonhead) will reach a height of 0.9m and a spread of 0.75m after 2-5 years.
Suggested uses
Bog garden, Containers, Waterside, Wildlife
Cultivation
Grow in wet or boggy soil or in water up to 10cm deep. Prefers full sun but easily tolerates partial shade. Found at river swamp openings and in the margins of both freshwater and brackish tidal marshes.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Moisture-retentive
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
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 11, Zone 10, Zone 9, 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: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moist but well-drained, Moisture-retentive | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
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