{"id":11797,"date":"2022-06-10T10:53:29","date_gmt":"2022-06-10T08:53:29","guid":{"rendered":"https:\/\/www.gardensillustrated.com\/?p=2203"},"modified":"2022-06-10T12:29:10","modified_gmt":"2022-06-10T10:29:10","slug":"the-best-varieties-of-thalictrum-and-how-to-grow","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/gardensillustrated\/rss_feed\/the-best-varieties-of-thalictrum-and-how-to-grow\/","title":{"rendered":"The best varieties of thalictrum and how to grow"},"content":{"rendered":"

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By Rosa Sherwood\n \t\t<\/p>

Published: Friday, 10 June 2022 at 12:00 am<\/p>

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Gardeners invariably think of thalictrum, or meadow rues, as tall, airy plants with ferny foliage and slender stems topped by mauve flowers. A herbaceous perennial<\/a>, thalictrum take their name from Thalia, one of the Greek muses, and often exude a delicate, willowy charm that few of us can resist.<\/p>\n

Thalictrum has much to offer as garden plants and many have the rare qualities of a delicate, understated elegance and a strong architectural presence.<\/p>\n

What are thalictrum?<\/h2>\n

Thalictrum are mainly herbaceous perennials, often with delicate, fern-like foliage, and small flowers in shades of purple, mauve, white or acid-green.<\/p>\n

They are a genus of around 150 species in the Ranunculaceae<\/em> (buttercup) family, from mostly native to temperate regions of the world. Most thalictrum flower in early to late summer, and their heights vary enormously from a few centimetres to head-height and above.<\/p>\n

How to grow thalictrum<\/h2>\n

Where to grow thalictrum<\/h3>\n

Many thalictrums originate from damp, often shaded situations, so tend to prefer those type of conditions, however, most will do well in moist, well-drained, humus-rich soil in a sheltered position, with or without shade, as long as their roots are not allowed to dry out.<\/p>\n

Thalictrums generally hate dry summers, so be prepared to water them in droughts especially in their first season. It\u2019s advisable to mulch well to help conserve moisture.<\/p>\n

How to grow thalictrum from seed<\/h3>\n

Thalictrums are easy to grow from seed, but this must be sown once it ripens on the plants in late summer or autumn. Thalictrum seed (as with many members of the buttercup family) has a short period of viability. Remember to deadhead if you don\u2019t want plants to self seed.<\/p>\n

How to propagate thalictrum<\/h3>\n

To propagate named cultivars, divide the rootstock of established clumps in early spring, just before they come into growth. Pot up the divisions and grow on until roots are well established, before planting out in the garden.<\/p>\n

How to care for thalictrum<\/h3>\n

Taller thalictrum often need some support<\/a>, but it\u2019s best done discreetly with pea sticks or thin metal stakes. Growing them in the middle of a border gives them some support from surrounding plants and also helps hide any shabby foliage low down.<\/p>\n

Like many in the buttercup family, or Ranunculaceae, thalictrum contain toxic alkaloids, so they are rabbit- and deer-proof. Contact with the foliage may irritate the skin so it\u2019s advisable to wear gloves.<\/p>\n

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The best thalictrum to grow<\/h2>\n

Thalictrum delavayi<\/em>\u00a0\u2018Ankum\u2019<\/h3>\n
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Come July, this very select, airy form produces generous sprays of pale-lilac \u2018petals\u2019 surrounding sulphur-yellow stamens. A selection made by Coen Jansen and named for his nursery in Ankummer, in the Netherlands.Height<\/strong> 2m. Hardiness rating<\/strong> USDA 5a.<\/p>\n

Thalictrum delavayi<\/em>\u00a0var.\u00a0decorum<\/em><\/h3>\n
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Long, dark, wiry stems hold small, delicate, three-lobed, green leaves topped by relatively large, bluish-purple flowers, each with four pointed \u2018petals\u2019 set around a boss of golden stamens.Height<\/strong> 1m. Hardiness rating<\/strong> USDA 5b-8b.<\/p>\n

Thalictrum lucidum<\/em><\/h3>\n
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Slender and upright with stiff, ridged, green stems and unusual shiny, green, herringbone-shaped foliage. The fragrant, wispy, lemon flowers appear in July, by which time the leaves will have yellowed.Height<\/strong> 2-3m. Hardiness rating<\/strong> USDA 7a-9b.<\/p>\n

Thalictrum Splendide<\/em> White\u00a0(= \u2018Fr21034\u2019)<\/h3>\n
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Selected by French breeder Thierry Delabroye from a cross between\u00a0Thalictrum delavayi<\/em>\u00a0and\u00a0Thalictrum elegans<\/em>, this produces a profusion of sparkling white flowers on elegant stems above aquilegia-like foliage.Height<\/strong> 2m. Hardiness rating<\/strong> USDA 4a-7b.<\/p>\n

Thalictrum\u00a0delavayi<\/em>\u00a0var.\u00a0mucronatum<\/em><\/h3>\n
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Very similar to\u00a0Thalictrum delavayi<\/em>\u00a0var.\u00a0decorum<\/em>, but is often taller and perhaps with a definite point to the end of each petal. The pretty, bell-shaped flowers are lilac-pink with primrose stamens. Stood out on the trial.Height<\/strong> 2m.<\/p>\n

Thalictrum\u00a0ramosum<\/em><\/h3>\n
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A dainty Chinese thalictrum with black, wiry stems and dark buds held above tiny, blue-green leaves. Flowers are large, lavender orbs of stamens and last a very long time. Only available at Cr\u00fbg Farm Plants.Height<\/strong> 30-40cm.<\/p>\n

Thalictrum\u00a0flavum<\/em>\u00a0subsp.\u00a0glaucum<\/em><\/h3>\n
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Grown for its handsome powdery, blue-grey foliage, strong upright stems and frothy, yellow flowers. Foliage emerges pale-yellow and is often used with dark tulips. Heigh<\/strong>t 1.5m. Hardiness rating<\/strong> RHS H7, USDA 5a-9b.<\/p>\n

Thalictrum\u00a0ichangense<\/em><\/h3>\n
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A small, slow-growing Asian species with huge potential if it proves reliable over winter. The plum-leaved forms have miniature begonia-like foliage. Several duskier forms are being micropropagated.Height<\/strong> 5cm. Hardiness rating<\/strong> USDA 6a-9b.<\/p>\n

Thalictrum<\/em>\u00a0\u2018Anne\u2019<\/h3>\n
\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>\n

A star performer with dramatic, architectural stems that are thinner and blacker than those of \u2018Elin\u2019 (below left) but still self-supporting. Pretty, blue-green foliage and pink buds that mature to white, but ordinary flowers.Height<\/strong> 2.5m.<\/p>\n

Thalictrum<\/em>\u00a0\u2018Elin\u2019<\/h3>\n
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Tall, strong, damson-toned stems, purple-flushed grey-blue foliage and delicate purple and cream flowers. At Great Dixter in East Sussex it\u2019s used with the purple\u00a0Tulipa<\/em>\u00a0\u2018Shirley\u2019 to great effect.Height<\/strong> 2.5m. Hardiness rating<\/strong> USDA 5a-9b.<\/p>\n

Thalictrum<\/em>\u00a0minus<\/em>\u00a0\u2018Adiantifolium\u2019<\/h3>\n
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Small and low growing with delicate foliage, similar to a maidenhair fern, which lasts well all season. A perfect foliage plant for quiet, shady areas. Clump forming and non-invasive. Insignificant yellowish flowers.Height<\/strong> 30-40cm.<\/p>\n

Thalictrum<\/em>\u00a0\u2018Tukker Princess\u2019<\/h3>\n
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A giant form with stems striped in pink, dusky-grey and lime-green \u2013 reminiscent of a pair of grandad\u2019s well-washed pyjamas. Large soft-yellow flowers contrast with the glaucous, ferny foliage that lasts until November. Spectacular.Height<\/strong> 2-3m.<\/p>\n

Suggested combinations with thalictrum<\/h3>\n

Thalictrums with colourful stems are extremely useful in modern prairie-planting schemes<\/a> that involve statuesque, late-flowering perennials and grasses<\/a>. This is because thalictrums are out of the ground by March and by mid-April they\u2019re 30cm high while the rest of the border is generally still underground. The new growth emerges like strong asparagus spears, then leafs into purple-flushed growth. This doesn\u2019t get eaten by slugs, or suffer from frost damage, so is often used as a backbone in continental planting.<\/p>\n

April-flowering tulips<\/a> work well with young thalictrum foliage and you can create a beautiful blend with the dusky Triumph tulips \u2018Shirley\u2019 and \u2018Negrita\u2019, or set off an ivory-cream Darwin tulip, such as \u2018Floradale\u2019.<\/p>\n

Where to see thalictrum<\/h3>\n

Aberglasney Gardens<\/a><\/h4>\n

Llangathen\nCamarthenshire\nSA32 8QH<\/p>\n

Tel 01558 668998<\/p>\n

Great Dixter<\/a><\/h4>\n

Northiam\nRye\nEast Sussex\nTN31 6PH<\/p>\n

Tel 01797 252878<\/p>\n

Where to buy thalictrum<\/h3>\n