Plant Library

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

Ranunculus aconitifolius

Ranunculus aconitifolius

Aconite-Leaf Buttercup

10365774889271|Ranunculus aconitifolius|Aconite-Leaf Buttercup|

A refined buttercup relative with deep green, three to five-lobed leaves forming loose mounds in early spring. Tall, sparsely-leaved stems branch extensively with each tip bearing a pristine white saucer-shaped flower centred with yellow stamens. Mature specimens create an ethereal white cloud effect.

Tolerates substantial shade and grows readily in regular garden soil enriched with compost. Goes dormant relatively early in summer, so best positioned where later-developing neighbours can fill the gap. Natural companions include ferns, molinias, and hostas. The profuse branching creates a remarkable floral display in late spring.

|May–June|white|deep green|upright clump|woodland gardens; shade borders; with ferns|70|50|part shade to shade|average|compost-enriched garden soil|low to moderate|goes dormant after flowering; tolerates significant shade; best with later neighbors to hide dormancy|yes|late spring flowers; white cloud effect; early season interest|pollinators|5||white saucer flowers; extensively branching; early summer dormancy; shade-tolerant; profuse blooming|//glenravennursery.com/cdn/shop/files/7BA8280D-2E57-4B08-B8DA-DCF2F2A1FC11_1_102_a.jpg?v=1767569346&width=800|
Ribes lacustre

Ribes lacustre

Swamp Gooseberry; Black Gooseberry

10365782163767|Ribes lacustre|Swamp Gooseberry; Black Gooseberry|

An upright to spreading deciduous shrub with slender stems armed with numerous small spines. The leaves are maple-like with three to five lobes and toothed edges. Small, saucer-shaped flowers in shades of red to maroon appear in drooping racemes in spring, followed by purple-black berries covered with glandular bristles.

Plants thrive in moist, cool sites with part to full shade, often found along streams and in mountain forests. The berries are edible but bristly and generally not palatable. Suitable for shaded woodland gardens and naturalistic plantings where the spiny habit can be accommodated. Provides cover for wildlife and the berries are consumed by birds. Native from Alaska to California and across northern North America.

|April–May|red to maroon|green|upright to spreading|shaded woodland; stream banks; cool moist sites; mountain gardens|120|100|part shade to full shade|moist|moist; cool; acidic|low|spiny throughout; berries edible but bristly; prefers cool sites; native Alaska across northern North America|no|spring flowers; summer berries; wildlife cover|pollinators; birds (fruit)|4||spiny stems; drooping flower racemes; bristly berries; shade-tolerant; mountain native|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Rodgersia pinnata

Rodgersia pinnata

Featherleaf Rodgersia

10365774922039|Rodgersia pinnata|Featherleaf Rodgersia|

A Chinese species distinguished by its pinnate or feathered leaves that can grow fifty to sixty centimetres long and forty-five centimetres wide. White flowers appear in substantial panicles on tall stems. The divided foliage creates elegant texture in shade gardens.

Spreads by short rhizomes, gradually expanding its territory. Occasionally pale pink flowering forms occur. The carmine-coloured seeds provide extended interest into late autumn. Requires consistent moisture and shade or dappled light. Great Plant Pick selection. Takes time to establish but becomes impressive with age.

|June–July|white|green|upright clump|shade gardens; woodland plantings; moist borders|120|100|part shade to shade|moist|humus-rich moisture-retentive|moderate|spreads by short rhizomes; GPP; carmine seeds attractive into fall; Chinese species|yes|bold feathered foliage; summer flowers; fall seed interest|pollinators|4||distinctive pinnate foliage; white flowers; carmine seeds; rhizomatous spread; Chinese native|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Rodgersia pinnata 'Die Stolze'

Rodgersia pinnata 'Die Stolze'

Featherleaf Rodgersia

10365774954807|Rodgersia pinnata 'Die Stolze'|Featherleaf Rodgersia|

Translating as 'the proud one', this cultivar features glossy green pinnate leaves with wide, flattened flower trusses. The feathered foliage can reach impressive dimensions, creating substantial mounds. Pink flowers are held in broad panicles that stand prominently above the leaf canopy.

Requires shade or dappled light with soil that holds moisture reliably through summer. The glossy leaf finish distinguishes it from many other rodgersias. Spreads slowly by short rhizomes, forming expanding clumps over time. Excellent architectural plant for shade borders and woodland gardens. European selection.

|June–July|pink|glossy green|upright clump|shade gardens; woodland borders; moist sites|120|100|part shade to shade|moist|humus-rich moisture-retentive|moderate|glossy foliage; wide flower trusses; European selection; slow spreading|yes|bold pinnate foliage; summer flowers; architectural presence|pollinators|4||glossy green pinnate foliage; wide flattened trusses; pink flowers; bold architectural form; slow rhizomatous spread|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Rodgersia podophylla 'Saarbrücken'

Rodgersia podophylla 'Saarbrücken'

Fingerleaf Rodgersia

10365774987575|Rodgersia podophylla 'Saarbrücken'|Fingerleaf Rodgersia|

A striking cultivar valued for its young foliage which emerges in dramatic chocolate tones. The large palmately divided leaves can reach fifty centimetres across, creating bold architectural presence. Light pink flower plumes appear on tall stems in summer, held well above the substantial foliage.

Performs best in dappled shade or shady positions with consistently moist, humus-rich soil. The chocolate leaf colour is most intense on emergence and gradually transitions to green through summer. Makes effective combinations with spring bulbs and moisture-loving perennials. Origin uncertain but garden-proven. Spreads moderately by rhizomes.

|June–July|light pink|chocolate aging to green|upright clump|shade gardens; moist borders; woodland settings|120|100|part shade to shade|moist|humus-rich moisture-retentive|moderate|chocolate foliage on emergence; origin uncertain; moderately spreading by rhizomes|yes|bold foliage; summer flowers; chocolate spring color|pollinators|4||chocolate-colored emerging foliage; large palmately divided leaves; light pink flowers; architectural form; rhizomatous|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Rudbeckia fulgida var. fulgida 'Goldsturm'

Rudbeckia fulgida var. fulgida 'Goldsturm'

Black-Eyed Susan

10365775053111|Rudbeckia fulgida var. fulgida 'Goldsturm'|Black-Eyed Susan|

A robust cultivar forming rapidly expanding clumps of roughly textured, dull green foliage. Displays profuse golden-yellow daisies with prominent blackish-brown central cones on sturdy, branched stems. The abundant flowering creates sheets of bright colour through summer and into autumn.

A foundational plant for naturalistic prairie-style gardens, combining effectively with numerous ornamental grasses including panicums, calamagrostis, and molinias. The branching framework and central cones provide structure that remains effective through fall and winter. Recognized with multiple awards including Perennial Plant of the Year 1999. Native to eastern and central North America.

|July–Sept|golden yellow|green|upright spreading|naturalistic gardens; prairie plantings; with grasses; meadows|100|90|full sun|average|average garden soil|low to moderate|PPA 1999; RHS AGM; GPP; rapidly spreading clumps; combines well with grasses; winter structure|yes|summer to fall bloom; profuse flowering; persistent cones through winter|pollinators|4||profuse golden flowers; dark brown cones; rapidly spreading; sturdy branching; long-lasting cones; multiple awards|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Rudbeckia 'Little Goldstar'

Rudbeckia 'Little Goldstar'

10365775020343||||||||||||||||||||||//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Rudbeckia maxima

Rudbeckia maxima

Giant Coneflower

10365775085879|Rudbeckia maxima|Giant Coneflower|

A dramatic coneflower with smooth, leathery, blue-gray basal leaves up to thirty centimetres long forming substantial clumps. Tall, sparsely-leaved stalks soar upward ending in enormous elongated cones up to eight centimetres long. The slightly drooping dark lemon-yellow petals can reach five centimetres in length.

Provides architectural drama and striking contrast in mid to late summer borders. Young spring foliage needs protection from slugs. Requires soil that drains well as standing water is not tolerated. Plants perform better with direct sun warming the low basal foliage. The exceptional height and glaucous foliage make this a standout specimen.

|Aug–Sept|yellow|glaucous green|upright clump|back of borders; specimen plantings; architectural interest|200|70|full sun|average|well-drained soils|moderate|protect spring foliage from slugs; needs good drainage; sun on basal leaves important; dramatic scale|moderate|late summer bloom; enormous cones; glaucous foliage; architectural presence|pollinators|3||enormous cones; glaucous basal foliage; extremely tall; dramatic scale; lemon-yellow petals; architectural|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|