Obedient Plant seeds can be sown outdoors in autumn or in spring after a short period of cold stratification. This treatment generally improves both germination speed and uniformity.
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Native perennial for moist sites
Lamiaceae
Native perennials for pollinators
Obedient Plant (Physostegia virginiana) – Seeds
Physostegia virginiana
Native perennial with long pale pink to violet-pink flower spikes, ideal for moist soils. Obedient plant attracts pollinators and gradually forms dense colonies through spreading rhizomes.
Quantity
Minimum 150 seeds
Exposure
Full sun to partial shade
Hardiness
Zones 3 to 8
Difficulty level
Moderate
Discover the plant
Family
Lamiaceae
Genus
Physostegia
Species
virginiana
Cultivar
Type
Native perennial for moist sites
Cycle
Perennial
Obedient Plant (Physostegia virginiana) is an upright native perennial known for long spikes of pale pink to violet-pink tubular flowers. Individual blooms can be gently repositioned along the stem and will temporarily remain in place, a distinctive feature that inspired the common English name obedient plant. From July through October, the extended flowering period adds height, colour, and movement to borders, rain gardens, and prairie-style landscapes. Dark green foliage forms a dense clump, while flowering stems generally reach 60 to 100 cm. Exceptionally hardy, this perennial returns reliably in Quebec gardens and becomes more substantial as the root system matures.
Obedient plant prefers full sun or partial shade and loamy to clay-based soil that is rich in organic matter and consistently moist. Even moisture encourages abundant flowering and reduces stress during warm weather. Apply compost in spring and water whenever the soil begins to dry. Avoid excessive nitrogen, which can produce softer stems and too much foliage. This perennial spreads gradually through rhizomes and may develop vigorous colonies. In Quebec gardens, remove or contain outward-growing shoots where space is limited and divide established clumps every few years to maintain flowering, airflow, balance, and manageable growth.
Obedient plant suits pollinator gardens, riparian plantings, pond edges, and moist sections of naturalistic landscapes. Nectar-rich flowers attract bees, bumblebees, butterflies, hummingbirds, and many other beneficial insects for several weeks. Its dense root system also helps cover and stabilize moist soil. It pairs naturally with spotted Joe-Pye weed, blue vervain, cardinal flower, and blue flag iris. Long flowering stems can be used in fresh bouquets, while mature capsules contribute seed and autumn texture. Its combination of late-season colour, wildlife value, and adaptation to moist ground makes Physostegia virginiana especially useful in ecological Canadian gardens.
Planting guide
From planting to establishment.
Planting depth
5 mm
Spacing / density
45 to 75 cm (18 to 30 in)
Establishment temperature
18 to 22°C
Establishment time
14 to 30 days after stratification
Best planting time
Autumn or spring
Propagation
Seed, rhizome division, or shoot separation
Growing method
Sow Obedient Plant seeds in autumn or spring after a short period of cold stratification to improve germination. Cover the seeds lightly with about 5 mm (0.2 in) of fine growing medium and maintain consistent moisture until seedlings emerge. This perennial thrives in rich, organic soil and full sun to partial shade. Young plants establish quickly in sites where the soil remains cool throughout summer. Once mature, they gradually spread by rhizomes, making them excellent for naturalization, rain gardens, and stabilizing moist soils.
Soil and care
The right conditions.
Exposure
Full sun to partial shade
Soil pH
6.0 to 7.5
Hardiness zone
Zones 3 to 8
Minimum temperature
Approximately -40°C
Watering
Regular; keep soil moist to wet
Soil type
Loamy to clay-based, rich, moist to wet soil
Fertilization
Light spring compost; avoid excess nitrogen
Seasonal care
In spring, cut back dry stems and apply compost around the clumps without covering emerging shoots. During summer, water regularly to keep the soil moist, especially in sunny locations. Remove spent flowers to extend blooming or allow selected spikes to mature for seed. Monitor rhizome spread and remove shoots growing beyond the intended area. In fall, retain several stems to provide seed and shelter for wildlife. Divide colonies every three to five years to maintain vigour, improve flowering, and control their overall width.
Container growing
A controlled environment.
Recommended pot size
30 to 45 cm (12 to 18 in)
Obedient Plant performs very well in large containers when grown in rich, consistently moist growing media. Use a pot at least 30 to 45 cm (12 to 18 in) in diameter with excellent drainage and enrich the soil with compost to encourage abundant flowering. This perennial quickly forms an attractive clump that adds height and elegance to patios and balconies. Regular watering is essential during warm weather because the plant prefers evenly moist soil. Even in containers, it attracts numerous pollinators throughout the growing season.
Bloom and dimensions
The complete profile.
Flower color
Pale pink to violet-pink
Foliage color
Dark green
Foliage type
Deciduous
Growth rate
Moderate to fast
Bloom period
July to October
Fruiting
Capsules containing numerous small seeds
Maximum height
100 cm
Maximum width
Variable depending on rhizome control
Harvest
August to October as capsules dry
Garden associations
What to plant with it.
Good companions
Spotted Joe-Pye weed, blue vervain, cardinal flower, blue flag iris
Avoid planting with
English lavender, cotton lavender, rockroses, and stonecrops
Rain garden, riparian planting, pollinators, naturalization, bouquets
From the garden to inspiration.
Frequently asked questions
Everything toknow.
Yes. Its nectar-rich flowers attract a remarkable diversity of bees, butterflies, and occasionally hummingbirds, making it an excellent plant for supporting pollinators.
Yes. This species thrives in cool to moist soils and is particularly well suited to rain gardens, riparian buffers, and other consistently moist sites.
Obedient Plant spreads gradually by rhizomes under favorable conditions. Dividing mature clumps every few years easily controls its spread while producing new plants.
Cut back the stems in autumn or early spring, apply compost annually, and water regularly during dry periods. These simple steps encourage vigorous growth and prolonged flowering.
Its strengths, naturally.
Not recommended for pets
Pets
Attracts or supports pollinating insects
Pollinators
Plants that attract butterflies
Butterflies
Flowers that attract hummingbirds
Hummingbirds
