Physostegia Virginiana Summer Snow Seeds - Obedient plant
Physostegia Virginiana Summer Snow Seeds - Obedient plant
Physostegia Virginiana Summer Snow Seeds - Obedient plant
Physostegia virginiana Summer Snow
Obedient plant, Virginian False Dragonhead, Accommodation Flower, American Heather, Lady of the Lake, Lion's Heart, Mexican Heath
I find this packet containing very few seeds very expensive, so I regret this purchase. Now, we'll have to see if they will germinate.
Christine H., 19/02/2020
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Description
Physostegia virginiana 'Summer Snow' in flower creates a small event in the garden. This very hardy, robust perennial presents a bushy clump that produces narrow, slightly erect, snowy candles in the summer, covered with mischievous white flowers. When pushed around the inflorescence's axis to face another direction, they permanently maintain their position, as if they have fallen into some sort of cataleptic state. Obedient plant requires sun and a fertile, humus-rich soil that stays moist to really flourish.
Physostegia virginiana Summer Snow belongs to the family Scrophulariaceae. It is a cultivar derived from Physostegia virginiana, a plant native to eastern and central North America. It is a herbaceous plant that presents a creeping rootstock that rapidly produces an erect clump of unbranched stems that measure up to 60 cm in height and width. The top of the 10-12 cm long spikes' stems are covered with small white tubular flowers that bloom in the middle of summer. The flowers are attached to the axis by a small organ that acts as a kind of articulation that allows the flower to orient itself in any direction and maintain its position. They are arranged into 4 rows. The deciduous foliage is composed of 10 cm long, narrow, lanceolate, shiny dark green leaves with serrated edges. The plant has a suckering habit and carries large white roots resembling those of bindweed, that allow it to slowly spread.
Physostegia virginiana Summer Snow is easy to grow and thrives in moist soils in the sun. It is often planted at the edge of ponds or used for making bouquets, as its flowers look very pretty and last long in floral arrangements in vases. It is also well suited to perennial and shrub beds where it combines well with summer asters (Aster novae angliae), the soft blooms of the 'Phantom' hydrangea or landscape roses with pastel-coloured flowers.
Flowering
Foliage
Plant habit
Botanical data
Physostegia
virginiana
Summer Snow
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
Sowing time : February to July.
Sow Physostegia seeds in seed trays, pots, etc., in soil that has been prepared for sowing. Place in a propagator or a warm place to maintain at an optimal temperature of 20-25 °C. Place the seeds on the surface of a mixture of peat, sand and potting soil and do not exclude light. Germination is very slow and irregular. Keep the soil moist to wet, but not saturated with water at all times.
Transplant the plants when they are large enough to be handled into 8 cm pots. Grow on in a cold frame and plant them out the following spring, 60 cm apart, in full sun or part shade.
Cultivation :
Physostegia virginiana Summer Snow is planted in spring or autumn, at a density of 5 plants per m2. Plant in light, moist, moderately rich, good quality garden soil, in a sunny position sheltered from strong winds. The soil must be kept moist in summer. Despite its vigorous growth, this plant does not like competing with other plants' roots. Mulch the soil in June with grass clippings. Divide the clumps as late as possible, about every five years. This plant is a remarkable sight in the sandy, loamy, moist soils of the Seine Valley.
Sowing period
Intended location
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).
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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.