Abelia 'Kaleidoscope' has long-lasting, fragrant flowers and variegated foliage in yellow, green, orange and red.

Abelmoschus manihot 'Auntie Lilli's' is an edible salad bele tree with beautiful tri-coloured foliage and hibiscus-like flowers.

Abelmoschus manihot 'Chief Kubo's Prize' has deeply cut palmate leaves and hibiscus-like, light yellow flowers. Both are edible.

Abutilon megapotamicum will bloom constantly from spring until fall with bright yellow and red pendulous lanterns.

Abutilon pictum 'Thompsonii' is a flowering maple that produces masses of peach bells set off by the yellow-spotted foliage.

Acanthus hungaricus 'White Lips' is a dramatic bear's breeches with spikes of light plum hoods and wide, white lips.

Acanthus mollis 'Hollard's Gold' is a very special bear's breeches with new leaves emerging gold or chartreuse.

Acanthus 'Morning Candle' is very free-flowering with extra tall and stately spires of mauve bracts and white flowers up to four feet tall.

Acer campestre 'Carnival' makes a stunning specimen in container or garden with its compact size and variegated leaves.

Acer palmatum 'Twombly's Red Sentinel' is a columnar Japanese maple with red spring foliage to brilliant red with orange hues in the Fall.

Achillea filipendulina ‘Gold Plate’ is a yarrow that produces masses of large golden-yellow flowers on tall stems.

Achillea Desert Eve 'Deep Rose' is a yarrow with dark pink flowers with yellow centres above fragrant, fern-like foliage.

Achillea millefolium 'Heartthrob' has large, flat-topped flower clusters with colourfast, velvet-red flowers above dissected, fern-like foliage.

Achillea millefolium 'New Vintage Red' has large, flat-topped flower clusters of bright red with white centres.

Achillea millefolium 'New Vintage Rose' has large, flat-topped flower clusters of rose pink with white eyes on strong stems to 24 inches.

Achillea millefolium 'New Vintage Violet' has large, flat-topped flower clusters of bright lavender pink with white centres.

Achillea ptarmica 'Peter Cottontail' is a unique yarrow with white, button-like flowers held in low, cloud-like mounds.

Achillea tomentosa ‘Goldie’ is a woolly yarrow that produces clusters of yellow flowers on top of evergreen, fuzzy foliage.

Achimenes 'Blue Sparks' is an orchid pansy related to the African violet with delicate white to lavender/blue tubular blooms.

Achimenes 'Cattleya' is an orchid pansy related to the African Violet with delicate violet-blue tubular blooms and lighter throats.

Achimenes 'Charm' is an orchid pansy related to the African Violet with delicate rosy-pink tubular blooms.

Achimenes 'Peach Blossom' is an orchid pansy related to the African Violet with delicate light pink tubular blooms and magenta throats.

Achimenes 'Snow Princess' is an orchid pansy related to the African Violet with delicate snow white blooms and tiny purple throats.

Actaea japonica 'Silver Blush' has has wands of creamy-white bottle brush flowers and serrated silver foliage maturing to green.

Actaea japonica 'Silver Dance' is has wands of creamy-white bottle brush flowers and silver foliage maturing to green.