Thalictrum rochebrunianum - Meadow-rue
Thalictrum rochebrunianum - Meadow-rue
Thalictrum rochebrunianum - Meadow-rue
Thalictrum rochebrunianum
Meadow Rue
Very pretty plant that blooms again every year!
Louise, 26/02/2026
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Description
Thalictrum rochebrunianum is an astonishing Japanese meadow rue, a tall plant but full of class. This very beautiful botanical species is as much admired for its particularly elegant, fine and finely cut bluish foliage as for its summer flowering formed of countless small, pink-purple cup-shaped flowers, with yellow-cream stamens. They are gathered in aerial, pendulous panicles, blooming at the end of tall, solid and straight stems. This wonderful perennial thrives in rather moist soil, in shade or semi-shade, away from direct sunlight that could scorch its foliage.
Thalictrum rochebrunianum, also known as lavender mist meadow rue, is a rhizomatous perennial plant native to Korea and Japan, belonging to the buttercup family. It is a herbaceous perennial, with an upright and erect habit, forming a bushy clump, from which thin and solid stems rise, tinged with purple, reaching a height of about 1.50 m (5ft), sometimes 2 metres (7 feet), in moist soil and in the sun), with a width of 40 to 50 cm (16 to 20in). Its deciduous foliage, slightly bluish-green, finely cut and very light, is composed of leaves 25 to 45 cm (10 to 18in) long, pinnate or ternate, with entire or lobed obovate leaflets. In July-August, large loose panicles appear, which are well-branched with small cup-shaped flowers; four blue-purple sepals, enhanced by prominent yellow creamy stamens. Not liking competition of nearby roots, a planting distance of 40 cm (16in) around its base should be allowed. Meadow rue is rather slow to establish, but it will become more and more beautiful over time.
This Thalictrum rochebrunianum has the same ornamental function as paniculate Gypsophilas, but unlike them, it chooses damp and shaded areas of the garden. With its development, delicate and elegant foliage, as well as its ethereal appearance, it will be perfect to give height and lightness to flowerbeds. Despite its size, its transparent silhouette allows it to also be planted at the front of flowerbeds. It will be very effective in contrast with less delicate perennials (Rodgersia, blue Hostas), as well as at the edge of shrub flowerbeds. It will naturally find its place in the company of Hydrangeas, shrub or climbing Roses, Fuchsias, Japanese Anemones, Aconites, Astilbes, Campanulas, Buckthorn, Snowberries, Ferns, Hellebores, Foxgloves, Grasses, perennial Geraniums, Elderberries, Sacred Bamboo, etc.
Thalictrum rochebrunianum - Meadow-rue in pictures
Flowering
Foliage
Plant habit
Botanical data
Thalictrum
rochebrunianum
Ranunculaceae
Meadow Rue
Southeast Asia
Planting and care
Despite its delicate and fragile appearance, Thalictrum rochebrunianum is a hardy and low-maintenance perennial. It simply needs to be planted in partial shade or even in shade, in a moist and well-drained soil, rich in organic matter and with little limestone. It can also be established in full sun, as long as the soil remains moist and there is ambient humidity around the plant. Planting can be done in spring or autumn. Planting it at the base of a north or east-facing wall would be ideal. It is advisable to amend the soil with compost each year to improve winter drainage and facilitate root development. Regular watering is also necessary during dry and hot periods. Regularly deadhead the flowers to prolong the flowering period. Losing its leaves in autumn and disappearing completely in winter, it will only reappear in spring quite late. Therefore, it is recommended not to cut the plant to the ground in autumn, so as not to forget its location the following spring. It is a bit slow to establish, but it will delight the gardener over the years! Due to its large size, staking may be necessary, especially if this Meadow Rue is planted as a specimen or in a windy location. To avoid this inconvenience, it is advisable to plant it in the middle of other plants and bushes for support. Dividing the clumps can be carried out in March-April by cutting the clump into several pieces with a spade, but it takes a long time for the divisions to establish. Although highly resistant to diseases, it may be susceptible to powdery mildew during droughts and slug attacks at the start of the growing season.
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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