Ranunculus Aviv Mixture is a multicoloured mix of Persian buttercups in shades of red, pink, white, yellow, and orange.

Ratibida columnifera 'Red' is a Mexican hat plant with blooms of deep red and yellow that appear to float above feathery foliage.

Ratibida columnifera 'Red Midget' has highly saturated blooms of deep red and yellow that appear to float on airy, feathery foliage.

Rheum alexandrae is a rare species of rhubarb from the mountains of China and Tibet with heart-shaped leaves and yellow flowers.

Rheum rhabarbarum 'Canada Red' is a culinary rhubarb with short, tender stalks that are bright red, tender, very sweet and juicy.

Rheum rhabarbarum 'Glaskin's Perpetual' is a culinary rhubarb with short, tender stalks that are bright red, tender, very sweet and juicy.

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

Rheum rhabarbarum 'Red Champagne' is an old variety of rhubarb with long red stems that are sweet to the taste and an early producer.

Rheum 'Strawberry Red' is noted for its deep red, tasty, sweet stems with a mild flavour that hold their colour when cooked.

Rhododendron makinoi has funneled, bell-shaped, pink to off-white flowers, sometimes spotted crimson and narrow, lance-shaped leaves.

Rhododendron oreotrephes is a floriferous rhododendron with bluish leaves that smell of warm spices with notes of cinnamon and pine.

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

Rhododendron 'Boule de Neige" midseason flowers are pure white.

Rhododendron 'Bubblegum' has larger flowers than it’s predecessor and makes a terrific show.

Rhododendron 'Cody' has frilly-edged pink flowers, pale yellow overlaid with moderate purplish pink at edges.

Rhododendron 'Florence Parks' produces abundant whorls of attractive deep purple flowers.

Rhododendron 'Holden's Solar Flair' has medium-large, creamy-yellow flowers, with showy red marks in the throat.

Rhododendron 'Nancy Evans' has orange-red buds open to yellow hose-in-hose blossoms in mid-season.

Rhododendron 'Neon' has a vivid orangey-peach with a yellow throat, dark leaves, and compact growing to boot!

Rhododendron 'Percy Wiseman' has rare peach-colored blossoms that appear in midseason.

Rhododendron 'Polarnacht' has frilly deep dark purple blooms with spotted red throats are held in trusses of 12-14.

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

Rhododendron 'Purple Passion' has regal, deep reddish purple blooms highlighted with white and delicate maroon spots.

Ribes uva-crispa 'Little Ben' is a compact gooseberry that produces tasty large sized red fruit.

Rodgersia aesculifolia 'Cherry Blush' has large, palmate leaves flushed bronze and bright pink flowers.