Thalictrum aquilegifolium Thundercloud - Meadow-rue
Thalictrum aquilegifolium Thundercloud - Meadow-rue
Thalictrum aquilegifolium Thundercloud
Meadow-rue, Columbine Meadow Rue
She too remained tiny.
PATRICE P., 09/09/2017
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Description
Thalictrum aquilegifolium Thundercloud' is a variety of Meadow Rue whose appearance evokes that of a tall paniculate Gypsophila. This superb semi-shade perennial develops very airy flower stalks, crowned with large mauve inflorescences that have a moss-like appearance. They are composed of small flowers with numerous very showy stamens, giving them a fluffy and velvety pompom-like aspect. Carried by purple stems, they are adorned with finely cut green-blue-silver foliage that strongly resembles that of Columbine. This Meadow Rue is a hardy, robust, and undemanding plant, ideal for structuring the back of borders with a light touch.
Native to damp and shady mountain meadows in Europe and Asia, Meadow Rue belongs to the family of Ranunculaceae, like anemones, clematis, and Columbines. This tall herbaceous perennial forms an upright clump, reaching a height of 90 cm (35in) to 1.10 m (4ft) and a width of 40 cm (16in). Sometimes slow to establish, its beauty is worth the wait.
The 'Thundercloud' variety, from which it originates, is distinguished by its beautiful dense tufted mauve-lilac flowering, with a very velvety appearance. Its green-blue leaves, 15 to 30 cm (6 to 12in) long, are divided into obovate leaflets on either side of the central vein and have undulate edges. The resemblance to the foliage of garden Columbines is quite striking. Appearing in late spring or early summer, the flowers are organized in large paniculate clusters, 18 cm (7in) in diameter, forming clouds of fluffy flowers. The spherical flowers, 8 to 10 mm (0.5 in) wide, are mostly composed of long radiating stamens, offering a tender and poetic spectacle from June to July. The dark purple stems that carry them are strong enough to not require staking.
It is in the middle or back of borders that this Meadow Rue will find its place. The flowering stems of the Meadow Rue are perfect for creating summer displays, with roses or peonies. It thrives in sunny or semi-shaded areas of the garden. A fresh and deep soil allows it to grow vigorously, but it is not afraid of summer heat, as long as it is watered occasionally in the late afternoon. It pairs well with lilies, as well as ferns, hostas, bellflowers, meadowsweets, hybrid butterbur, and perennial geraniums.
Tip: Dare to go tall with these giant plants that add structure and volume to the garden. The tallest ones, when isolated, will provide volume and lightness against a dark background of hedges or conifers. Those of intermediate size will compliment tall borders, such as those with giant dahlias.
Thalictrum aquilegifolium Thundercloud - Meadow-rue in pictures
Flowering
Foliage
Plant habit
Botanical data
Thalictrum
aquilegifolium
Thundercloud
Ranunculaceae
Meadow-rue, Columbine Meadow Rue
Cultivar or hybrid
Planting and care
Thalictrum plants can be planted in spring or autumn, in the middle or at the back of a flowerbed, in partial shade on rich, deep and moist soil, even clay and calcareous soils. Water during dry weather and spread mulch on the soil to maintain moisture in summer. Do not cut the plants down to the ground after flowering, as new shoots will only emerge at the end of the following spring. Therefore, it is advisable not to cut the plant down in autumn, so as not to forget its location the following spring. Remove faded flowers to prevent excessive self-seeding. Thalictrum is perfectly hardy, resisting temperatures as low as -21°C (-5.8°F). Although generally very robust, it can be susceptible to powdery mildew in hot and dry weather. Gastropods may cause some damage in spring.
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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