Ranunculus Aviv Red is a Persian buttercup with rich red flowers.

Rheum rhabarbarum 'Holsteiner Blut' is a culinary rhubarb known for its great flavour and bright red stalks.

Rhodochiton atrosanguineus 'Purple Bells' is an exotic tender vine with dark purple tubular flowers and light purple calyces.

Rhodoendron catawbiense 'Royal Resilience' has glowing lavender-pink flowers and great disease resistance.

Rhododendron 'Bloombux' is a dwarf evergreen shrub with soft pink flowers and glossy green leaves.

Rhododendron 'Blue Baron' is a semi-dwarf, compact, evergreen shrub with unique violet-blue flowers in spring.

Rhododendron 'Capistrano' has large, pastel-yellow flowers with frilly edges and muted, deep green foliage.

Rhododendron 'Cherry Cheesecake' has beautiful white flowers with dark red flecks and lightly ruffled bright pink edges.

Rhododendron 'Honey Butter' is a stunning semi-dwarf cultivar with incredible sunset shades of yellow, orange and pink.

Rhododendron 'Landmark' has large trusses of dark pink flowers with red specked throats and dark bronze winter foliage.

Rhododendron 'Minnetonka' has light purple to pink flowers with yellow-green specks from red-violet flower buds.

Rhododendron 'Purple Gem' is a semi-dwarf, compact evergreen shrub with purple to violet flowers in spring. Hardy to zone 4.

Ribes hirtellum 'Oregon Champion' is an early ripening, mildew resistant gooseberry with large, yellow-green fruit.

Ribes odoratum Black Topaz is often called clove currant because of its sweet fragrance. The black berries are also delicious.

Ribes odoratum 'Missouri Giant' is often called clove currant because of its sweet fragrance. The black berries are also delicious.

Rodgersia 'Dark Pokers' has big, bold, bronzy leaves that create a real garden statement.

Rosa foetida 'Bicolor' is known as the Austrian copper rose with hot red petals with yellow reverses.

Rosa foetida 'Persian Yellow' has bright yellow semi-double flowers on arching stems.

Rosa nutkana, known as the Nootka, bristly, or wild rose, is native to western North America from Alaska to California.

Rosa woodsii is a native rose with many common names: Wood's, interior, common wild, mountain, pear-hip, and prairie rose.

Rosa 'Chinook Sunrise' offers semi-double flowers in soft coral orange, pink, cream, and yellow hardy to zone 3!

Rosa 'Arctic Blue' is a Weeks shrub rose bearing unique lilac pink blooms with moderate fragrance.

Rosa 'Brick House Pink' has stunning neon pink semi-double flowers on compact plants perfect for containers.

Rosa 'Burgundy Iceberg' offers a range of unique colours from burgundy to purple with light honey fragrance.

Rosa 'Bill Reid' offers continuous-blooming, semi-double flowers in shades of yellow and apricot. Hardy to zone 3!