Plant Library

An index of the perennial plants grown and offered at Glenraven.

Anthemis tinctoria ‘E.C. Buxton’

Anthemis tinctoria ‘E.C. Buxton’

Chamomile

10365766926647|Anthemis tinctoria ‘E.C. Buxton’|Chamomile|

A long-flowering selection of Anthemis tinctoria, producing a steady display of pale yellow, daisy-like flowers from early summer until frost. In lean, well-drained soils it forms a strong, upright clump and maintains its flowering momentum over a remarkably long season. In wetter climates, an early autumn cut-back helps ensure reliable performance the following year.

|June–Oct|yellow|grey-green|upright clump|perennial borders; gravel gardens; dry garden plantings|70|90|full sun|average|lean, well-drained soils|moderate|flowers continuously from June until frost; performs best in lean, well-draining soils; in areas with high rainfall, plants benefit from being cut back to 10–15 cm before the end of September for optimal performance; AGM|yes|extended summer flowering|pollinators|4||long flowering season; fine-textured foliage; reliable clump former|//glenravennursery.com/cdn/shop/files/292E53D2-2269-4B88-AC38-972A35608F55_1_102_o.jpg?v=1767383613&width=800|
Anthemis tinctoria ‘Sauce Hollandaise’

Anthemis tinctoria ‘Sauce Hollandaise’

Chamomile

10365766959415|Anthemis tinctoria ‘Sauce Hollandaise’|Chamomile|

A cream-flowered selection of Anthemis tinctoria, forming an upright clump and flowering steadily from early summer until frost. It shares the same long season and reliable performance as ‘E.C. Buxton’, particularly in lean, well-drained soils. In wetter climates, an early autumn cut-back supports continued vigour and flowering in subsequent years.

|June–Oct|yellow|green|upright clump|sunny borders; lean, open plantings|80|90|full sun|dry to average|well-drained; lean soils|moderate|cream-coloured selection with the same effortless flowering traits as ‘E.C. Buxton’; in areas of high rainfall, plants benefit from being cut back to 10–15 cm before the end of September for optimal performance|yes|extended summer flowering|pollinators|4||very long flowering period; cream-coloured daisy flowers; clump-forming habit|//glenravennursery.com/cdn/shop/files/FD84DB03-79F3-45D3-8769-5D18C7F293B3_1_105_c.jpg?v=1767570728&width=800|
Anthriscus sylvestris ‘Dial Park’

Anthriscus sylvestris ‘Dial Park’

Cow Parsley

10365766992183|Anthriscus sylvestris ‘Dial Park’|Cow Parsley|

A dark-leaved selection of cow parsley with foliage deeper in colour than ‘Ravenswing’, forming a rich purple mound early in the season. Airy white umbels appear in late spring, carried above the foliage on open, branching stems. Plants self-seed freely, and selection of seedlings is required to retain the darkest leaf colouring.

|May–June|white|dark purple|upright clump|perennial borders; meadow-style plantings; early-season structure|120|60|full sun to part shade|average|fertile, well-drained garden soils|moderate|bronze-purple foliage emerges early in spring, followed by airy white umbels; readily self-seeds and may revert to green-leaved forms if seedlings are not selected|no|spring foliage and flowering|pollinators|3||very dark purple foliage; airy spring flowering; strong self-seeding|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Anthriscus sylvestris ‘Ravenswing’

Anthriscus sylvestris ‘Ravenswing’

Cow Parsley

10365767024951|Anthriscus sylvestris ‘Ravenswing’|Cow Parsley|

A striking spring perennial grown for its dark, mahogany-toned foliage and airy white umbels held on open, branching stems. The foliage forms a low mound early in the season, with flowers appearing in late spring before the plant begins to fade. Raised from seed, ‘Ravenswing’ will self-seed, and seedlings should be assessed to retain the deepest leaf colouring.

|May–June|white|deep purple|upright clump|perennial borders; meadow-style plantings; early-season structure|100|45|full sun to part shade|average|fertile, well-drained garden soils|moderate|raised from seed; foliage forms a slaty, mahogany-coloured mound in spring, followed by airy white umbels; seedlings should be monitored to maintain dark-leaved forms|no|spring foliage and flowering|pollinators|3||dark purple foliage; airy spring flowering; strong self-seeding potential|//glenravennursery.com/cdn/shop/files/anthriscus_ravenswing.webp?v=1767385616&width=800|
Aruncus dioicus ‘Whirlwind’

Aruncus dioicus ‘Whirlwind’

Goat’s Beard

10365767319863|Aruncus dioicus ‘Whirlwind’|Goat’s Beard|

A large, clump-forming perennial valued for its bold foliage and tall, plume-like white flowers in early summer. ‘Whirlwind’ develops into a substantial plant, best suited to moisture-retentive soils at the margins of woodland or in generous borders. Given adequate space and moisture, it forms a durable, long-lived presence rather than a compact accent.

|June–July|white|green|large clump|perennial borders; woodland margins; moisture-retentive sites|150|120|part shade|moist|moisture-retentive; fertile garden soils|low|produces large, upright plumes in early summer; requires space and consistent moisture to perform well; distinct from compact hybrids such as Kneiffii selections|yes|early summer flowering; strong foliage presence|pollinators|4||large plume-like flowers; bold foliage mass; early summer flowering|//glenravennursery.com/cdn/shop/files/aruncus_whirlwind.jpg?v=1767392182&width=800|
Aruncus dioicus ‘Liz’s Goat’

Aruncus dioicus ‘Liz’s Goat’

Goat’s Beard

10365767287095|Aruncus dioicus ‘Liz’s Goat’|Goat’s Beard|

A refined selection of goat’s beard noted for its balanced, upright habit and finer texture than the species. It forms a leafy, bush-like clump that remains effective well beyond flowering, particularly in woodland conditions. The flower plumes are shorter and more restrained than typical forms, giving the plant a quieter, more foliage-forward presence through the season.

|June–July|white|green|upright clump|woodland gardens; part-shaded borders|130|90|part shade|average to moist|moisture-retentive; fertile garden soils|low|selected from a group of standard goat’s beard plants; finer texture and shorter creamy-white plumes than the species; establishes well in woodland conditions; foliage may show muted yellow and orange tones in fall in drier or sunnier sites|yes|early summer flowering; foliage presence into fall|pollinators|3||fine-textured foliage; upright habit; shorter flower plumes; strong foliage presence|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Asclepias ‘Hello Yellow’

Asclepias ‘Hello Yellow’

Milkweed

10365767450935|Asclepias ‘Hello Yellow’|Milkweed|

A compact, upright milkweed producing clear yellow flower clusters through much of the summer. Shorter and tidier than many species forms, ‘Hello Yellow’ maintains a contained clump while still offering the distinctive structure and seasonal presence associated with the genus. Well suited to sunny borders and meadow-style plantings where height needs to be controlled.

|June–Aug|yellow|green|upright clump|perennial borders; meadow-style plantings; wildlife gardens|60|50|full sun|average|well-drained; adaptable to garden soils|low|compact selection producing bright yellow flower clusters; flowers over an extended summer period; typical milkweed growth habit without excessive height|yes|summer flowering|pollinators|5||upright clump; bright yellow flowers; long flowering season|//glenravennursery.com/cdn/shop/files/asclepias_hello_yellow.webp?v=1767393301&width=800|
Asclepias incarnata

Asclepias incarnata

Swamp Milkweed

10365767352631|Asclepias incarnata|Swamp Milkweed|

A tall, upright milkweed with rose-coloured flower clusters held above clean green foliage from mid-summer into early autumn. It forms a substantial clump over time and sits naturally in damp-ground plantings and meadow-style borders, where its late-season flowering carries the garden forward.

|July–Sept|rose|green|upright clump|perennial borders; meadow-style plantings; damp ground|120|80|full sun|moist|moist; fertile, loamy soils |low|upright clump; late summer flowering; rose flower clusters |yes|late summer flowering|pollinators|4||upright clump; late summer flowering; strong wildlife value|//glenravennursery.com/cdn/shop/files/asclepias_incarnata.jpg?v=1767393856&width=800|