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The Antirrhinum 'F1 Twinny' series offers large 'butterfly' azalea flowered blooms that jostle one another for space on compact plants. 'Twinny Peach' is one of the most unusual and beautiful snapdragons ever, with delicate apricot-peach coloured blooms, it is an All America Selections Award Winner.

The Antirrhinum 'F1 Twinny' series offers large 'butterfly' azalea flowered blooms that jostle one another for space on compact plants. 'Twinny Violet' blooms with the most luscious, deep violet-magenta double blooms. They grow vigorously and flower freely and are excellent performers in both heat and rain.

'Twinny White' snapdragons produce large 'butterfly' or 'azalea' flowered blooms that jostle one another for space on compact plants. Given sunshine and well-drained soil, they grow vigorously and flower freely. The plants are exceptionally weather tolerant, and are excellent performers in both heat and rain.

Antirrhinum 'Yellow Shades' feature delicate primrose-yellow, frilled blooms on compact plants. Double snapdragon blooms are often referred to as 'butterfly' or 'Azalea' type blooms. Given sunshine and well-drained soil, they grow vigorously and flower freely.

Antirrhinum majus 'Kimosy' is a lovely dwarf variety of Snapdragon with a tidy, compact habit. An all-around excellent garden performer, the plants perform well in containers, in beds or in borders. In a wide range of colours they flower from early summer right through to mid-autumn.

Antirrhinum majus 'Lucky Lips' has been awarded the Fleuroselect Award. The judges were impressed by its height and compact plant habit. Blooming with distinctive contrasting bicolour purple-red and white flowers, a colour way that is often referred to as a 'silver bi-colour', it is ideal for adding height to borders or for cutting.

Antirrhinum majus 'Ruby' produces densely packed spikes that bloom in succession with voluptuous, ruby red flowers. Superb for contrast and for giving height to the border they also make an excellent cut flower. After they are done blooming, trim the plants back, and they will quickly be blooming again.

Worldwide, Antirrhinum is one of the most important 'summer cut-flowers', grown year-round in greenhouses they are adored by florists and gardeners alike. An all-around excellent garden performer, 'Snowflake' produces densely packed spikes that bloom in succession with pure white flowers.

Antirrhinum majus ‘Tetra Mix’ produce tall, stately plants with ruffled blooms in a rich variety of colours. The robust plants grow to around 90cm tall. Superb for contrast and for giving height to the border, they are grown year-round by florists as a cut flower and are an all-around excellent garden performer.

Aquilegia atrata is a beautiful free flowering species that is native to the alpine meadows and forest clearings of Switzerland and Northern Europe. With many branching stems of deepest coloured, almost black flowers. This is an outstanding, highly sought species that would be a showstopper in any garden.

Native to Canada and the US in all states east of the Rockies, this superb variety is quite unlike the usual Aquilegia. Growing just twelve to eighteen inches tall, with dark-green foliage and eye-catching, scarlet and lemon-yellow flowers which hang like drifts of softly illuminated lanterns.

Arabis is a very popular and useful plant and one of the best for the rockery. It is related to Aubrieta and is used in a similar fashion. 'Grandiflora Rosea' is a pink flowered cultivar that makes a good groundcover, it can be used in borders and is excellent for trailing over the edges of containers, over stones or down walls.

Prized for its beautiful silvery foliage, the fine grey-white stems of Artemisia ludoviciana bear silvery-white leaves that are fragrant, fuzzy and soft. This finely textured plant adds a different element to the garden, the texture and leaf form setting them apart from those other garden plants with rather less refined foliage.

Asperula orientalis, commonly known as Blue Woodruff is a charming little plant. A versatile and easy to grow annual which forms spreading mounds of airy foliage smothered in sweetly scented, clusters of tubular, sky-blue flowers.

Asphodeline lutea is an easy to grow perennial that has great architectural form. The overall impression is distinctly upright, so it is good for adding vertical interest to the garden. In early summer leafy stems arise that bear dense, unbranched cylindrical spikes of gorgeous yellow, star-shaped flowers.

Aubrieta 'Hendersonii' is a vigorous variety that is smothered by rich lilac-purple flowers for several months in spring. It grows to only 10 to 15cm tall at maturity, but with a spread of around 45cm it makes a lively edging to a sunny border, growing over rock walls or placed in stonewalls.