Plant Library

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

Amelanchier alnifolia

Amelanchier alnifolia

Saskatoon Berry

10365781672247|Amelanchier alnifolia|Saskatoon Berry|

Saskatoon berry native to western North America with white flowers in spring and edible purple berries in summer. Forms multi-stemmed shrubs or small trees. The berries are sweet and valued for pies and jams. Native from Alaska to California and eastward.

Adaptable to various conditions. The edible berries are important food source for birds and wildlife. Historic food source for First Nations peoples. The white flowers create showy spring display. Fall foliage develops yellow to red tones. Suitable for naturalistic plantings, edible gardens, and hedgerows. More drought-tolerant than eastern serviceberries.

|Apr–May|white|green|multi-stemmed shrub or small tree|native gardens; edible gardens; hedgerows; naturalistic plantings|300|250|full sun to part shade|average|adaptable average|low to moderate|native western N America; edible sweet berries; historic food source; fall color; bird food; adaptable|yes|spring bloom; edible summer berries; fall color; native shrub|birds; pollinators; people|2||white flowers; edible purple berries; fall color; multi-stemmed; western native; historic food; bird food|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Amorpha canescens

Amorpha canescens

Leadplant

10365766598967|Amorpha canescens|Leadplant|

A low, woody perennial of the prairie, forming compact shrubs with finely divided, grey-green foliage that gives the plant a soft, silvery cast. Slender upright spikes of deep violet flowers appear in early to midsummer, each floret tipped with a bright orange anther. Plants develop a deep, resilient root system and show notable tolerance for drought, heat, and poor soils. Growth is slow to establish but long lived once settled. Foliage remains tidy through the season and can carry subtle autumn tones.

|June–July|violet with orange anthers|grey-green|low, woody, clump-forming subshrub|prairie-style plantings; dry borders; gravel gardens; naturalistic meadows|90|90|full sun|dry to average|well drained; tolerates sandy, gravelly, or lean soils|low; cut back in early spring to encourage fresh growth; allow time to establish|slow to mature but highly durable; deep root system provides drought resilience; foliage gives a soft, silvery texture|moderate|silvery foliage in spring and summer; early to midsummer bloom; subtle autumn tones|excellent pollinator plant; attracts bees and beneficial insects|3||silvery foliage; deep violet flower spikes with orange anthers; drought tolerant; long lived|//glenravennursery.com/cdn/shop/files/amorpha_canescens.jpg?v=1765415105&width=800|
Amorpha canescens ‘Nana’

Amorpha canescens ‘Nana’

Dwarf Leadplant

10365766631735|Amorpha canescens ‘Nana’|Dwarf Leadplant|

A compact selection of leadplant, forming low, rounded mounds of finely divided, grey-green foliage. The dwarf habit keeps the plant tight and restrained, with the same silvery texture and summer flower spikes characteristic of the species. Violet blooms with orange anthers rise just above the foliage in early to midsummer. Plants establish slowly but develop deep, resilient root systems and show strong tolerance for drought, heat, and lean soils. Well suited to smaller spaces or foreground positions in prairie-style plantings.

|June–July|violet with orange anthers|grey-green|low, compact, woody subshrub|prairie-style borders; gravel gardens; dry foreground plantings; naturalistic meadows|45|60|full sun|dry to average|well drained; tolerates sandy, gravelly, or lean soils|low; cut back in early spring; allow time to establish|retains the species’ durability in a reduced scale; slow to mature but long lived|moderate|silvery foliage through summer; early to midsummer bloom; subtle autumn tones|attractive to bees and beneficial insects|3||dwarf habit; silvery foliage; violet flower spikes with orange anthers; drought tolerant|//glenravennursery.com/cdn/shop/files/amorpha_nana.jpg?v=1765415418&width=800|
Amsonia hubrichtii

Amsonia hubrichtii

Bluestar

10365766697271|Amsonia hubrichtii|Bluestar|A finely textured bluestar with narrow, thread-like leaves that give the plant a light, airy appearance through the growing season. Pale blue flowers cluster at the ends of early summer stems, followed by a steady expansion of foliage that can reach 80 cm by late summer. The plant’s most notable feature is its autumn colour, turning a clear, glowing gold before going dormant. Long lived and tolerant of heat, drought, and lean soils, it forms broad clumps that remain effective in naturalistic or mixed perennial plantings. If stems lean after flowering, a midseason cutback encourages a lower, sturdier shape.|June|pale blue|green turning golden yellow in fall|upright, clump-forming perennial with fine-textured foliage|sunny borders; naturalistic plantings; prairie-style gardens; mixed perennial beds|60|90|full sun|average to dry|well drained; tolerates sandy or lean soils|low; cut back by half after flowering if flopping occurs; otherwise minimal care needed|noted for exceptional fall colour; fine-textured foliage holds well through summer; responds well to midseason pruning|moderate|early summer bloom; fine foliage through summer; standout golden autumn colour|visited by pollinators; foliage structure provides seasonal texture|5||fine threadleaf foliage; pale blue flowers; brilliant golden fall colour; deep rooting; long lived; GPP and PPA (2011)|//glenravennursery.com/cdn/shop/files/amsonia_hubrichtii_2.webp?v=1765415829&width=800|
Amsonia tabernaemontana

Amsonia tabernaemontana

Bluestar

10365766730039|Amsonia tabernaemontana|Bluestar|

A long-lived, clump-forming perennial that develops upright, leafy stems through spring and early summer. Pale blue, star-shaped flowers appear early in the season, after which the plant continues to fill out, forming a dense, willowy mass of foliage that serves as a steady backdrop to later-flowering plants.

|June|blue|green|upright clump|perennial borders; naturalistic plantings; structural foliage plant|80|90|full sun|average to moist|well-drained; adaptable to a range of garden soils|low|flowers appear on shorter stems early; plant gains height and density through summer|yes|spring flowering; summer foliage; autumn colour|pollinators|5||upright clump; early-season flowering; persistent summer foliage|//glenravennursery.com/cdn/shop/files/amsonia_tabernaemontana.jpg?v=1767380647&width=800|
Schizachyrium scoparium 'Prairie Blues'

Schizachyrium scoparium 'Prairie Blues'

Little Bluestem

10365779018039|Schizachyrium scoparium 'Prairie Blues'|Little Bluestem|

A selection of little bluestem with blue tones to foliage. Synonym of Schizachyrium scoparium. Native to North American prairies forming important grassland component. The blue colouring creates attractive contrast. Develops warm fall tones as temperatures cool.

Requires full sun and lean soil for best performance. More compact growth habit. Suitable for prairie gardens, gravel gardens, and naturalistic borders. The drought tolerance is excellent once established. Combines well with prairie perennials. Clumping and well-behaved. The fall colour is attractive. The silvery seed heads catch light beautifully.

|Aug–Sept|silvery|blue green|upright clump|prairie gardens; gravel gardens; naturalistic borders|90|50|full sun|dry|lean well-drained|low|synonym of Schizachyrium scoparium; prairie native; blue tones; full sun and lean soil needed; drought-tolerant; compact|yes|late summer to fall; warm fall colors; silvery seed heads|seed for birds|4||blue-toned foliage; prairie native; compact habit; warm fall tones; silvery seed heads; prairie grassland component|//glenravennursery.com/cdn/shop/files/placeholder_portrait.png?v=1766878564&width=800|
Anemone leveillei

Anemone leveillei

Windflower

10365766795575|Anemone leveillei|Windflower|

A robust, upright anemone with freely branching stems and a notably long flowering season. White flowers with lilac undersides are carried above the foliage, distinguished by grey stamens rather than blue. Compared to Anemone rivularis, this species is sturdier and more floriferous, producing a steady succession of blooms through early and midsummer. It self-seeds readily under garden conditions.

|June-Aug|white|green|upright clump|perennial borders; mixed plantings; naturalistic plantings|80|40|full sun to part shade|average|well-drained; fertile garden soils|low|similar to Anemone rivularis but more robust and more freely branching; white petals with lilac undersides and grey stamens; self-seeds abundantly in garden conditions|yes|early to mid-summer flowering; extended bloom period|pollinators|5||branching habit; long flowering season; self-seeds readily|//glenravennursery.com/cdn/shop/files/anemone_leveillei.jpg?v=1767381813&width=800|
Anemone virginiana

Anemone virginiana

Windflower

10365766828343|Anemone virginiana|Windflower|A tall, upright anemone with clean white flowers followed by striking, cylindrical seed heads that persist well beyond flowering. Often compared with Anemone cylindrica, this species is distinguished by its broader petals and slightly larger flowers. It brings vertical structure early in summer and continues to contribute visual interest into late season as the seed heads mature. Self-seeds at a moderate rate in garden conditions.|June–July|white|green|upright clump|perennial borders; naturalistic plantings; seed head interest|120|40|full sun to part shade|average|well-drained; adaptable to garden soils|low|petals are broader and less incurved than Anemone cylindrica; develops prominent cylindrical seed heads valued for late summer and autumn arrangements; self-seeds moderately|yes|early summer flowering; ornamental seed heads into autumn|pollinators|4||tall upright habit; distinctive cylindrical seed heads; moderate self-seeding|//glenravennursery.com/cdn/shop/files/anemone_virginiana_2.jpg?v=1767382205&width=800|