Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba - Obedient Plant
Physostegia virginiana Alba
Obedient plant, Virginian False Dragonhead, Accommodation Flower, American Heather, Lady of the Lake, Lion's Heart, Mexican Heath
Thrives merrily in a corner of the garden where nothing else has ever wanted to shoot (heavy and poor soil).
Hervé, 19/07/2023
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Description
Physostegia virginiana 'Alba' is a beautiful variety with white flowers, a remarkable perennial for wetlands. Robust, very hardy, forming large clumps, this plant is adorned with white flowers arranged in a geometric pattern. When these mischievous flowers are touched, they permanently change their orientation. These plants are magnificent near ponds and other wet areas in full sun.
Physostegia virginiana Alba belongs to the Lamiaceae family, it is native to the eastern and central parts of North America where it is still found in damp to very wet environments, such as marshes, riverbanks, ditches or wet meadows. It is a rhizomatous herbaceous plant, forming an upright clump of unbranched stems, reaching 60 cm (24in) in all directions. Its growth is quite rapid. The flower spikes, 10-12 cm (4-5in) long, covered with small white tubular flowers, develop in the middle of summer, between June and July, at the top of the stems. The flowers are attached to the axis by a small organ that acts as a joint, allowing them to orient themselves in any direction and maintain their position. They are arranged in 4 rows. The deciduous foliage is composed of lanceolate leaves, 10 cm (4in) long and narrow, with toothed edges, which are shiny green. The plant has a semi-suckering stump, with large white roots resembling bindweed roots, allowing it to slowly spread. The vegetation disappears in winter and regrows in spring.
Easy to grow in moist soil, Physostegia virginiana 'Alba' is often planted along the edge of a body of water or used for making bouquets, as its flowers are both graphic and hold up well in vases for floral arrangements. This perennial will also find its place in flower and shrub beds, alongside summer asters, white hydrangeas or pastel-coloured shrub roses.
Physostegia virginiana Alba - Obedient Plant in pictures
Flowering
Foliage
Plant habit
Botanical data
Physostegia
virginiana
Alba
Lamiaceae
Obedient plant, Virginian False Dragonhead, Accommodation Flower, American Heather, Lady of the Lake, Lion's Heart, Mexican Heath
Cultivar or hybrid
Planting and care
Physostegia virginiana 'Alba' can be planted in spring or autumn, five feet per square metre, in garden soil that is always slightly damp to very damp, preferably non-calcareous, sheltered from strong winds and in the sun. The soil must not dry out in summer. Despite its vigorous growth, this plant does not like competition from other roots. Mulch the soil in June with lawn clippings. Divide the clumps as late as possible, about every five years. This plant is remarkable in sandy and loamy soils.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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