Primula Belarina 'Buttercup Yellow' has enormous heads of fragrant spring double flowers in buttery yellow.

Primula 'Yellow Ruffles' has enormous heads of fragrant spring double flowers in yellow.

Primula vulgaris 'Oakleaf Yellow Picotee' is a primrose that has unusually lobed leaves and umbels of bright yellow, orange, and red flowers.

Primula Prima Belarina 'Goldie' offers fully double, ruffled, golden yellow flowers with strong fragrance.

Ranunculus Aviv Yellow is a Persian buttercup with glowing lemon yellow flowers.

Luscious burgundy-black foliage and cheerful yellow buttercups.

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

Rhodoendron sinogrande has the largest leaves of any rhododendron which can be three feet long and one foot wide.

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

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

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

Rhododendron 'Nancy Evans' has glowing orange buds opening to yellow flowers.

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

Ribes odoratum 'Crandall' is often called clove currant because of its sweetly fragrant flowers that occur in early spring.

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

Ribes rubrum 'Blanka' is a white currant from Slovakia with excellent production of very large, white, sweet berries.

Ribes rubrum 'Cherry Red' is a delicious red currant that is a prolific producer of large, red, sweet and flavourful berries.

Ribes rubrum 'Gloire des Sablons' is a choice pink currant with abundant crops of sweet, tasty pink berries.

Ribes rubrum 'Honeywood' produces large clusters of berries good for fresh eating or red currant wine.