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Irish Florists > Flowers > Ageratum

Ageratum / Floss Flower

Ageratum Flower Description

With their abundance of blossoms allied to their long season - from the early summer until the first hard frost - makes ageratum a very popular garden flower. It's low and tight habit along with it's powder puff blooms means that ageratum looks excellent at the edges of structured flower beds. Floss flowers are also outstanding as gap fillers in borders of low growing plants and in flower boxes.

Garden varieties of the floss flower come in shades of white, pink, blue and mauve and some of the taller varieties are used in flower arranging and floral displays.
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Cultivation of Ageratum

Ageratum Flowers

Floss Flowers should be sown in early spring under glass or other such protective covering. Seedlings should be hardened off in cold frames before planting out the young plants in permanent beds in the late spring or early summer.

Dwarf varieties of ageratum should be planted 23cm apart. Taller varieties are best planted 30cm apart. Sheltered and sunny sites are best for floss flowers and soils that retain moisture are ideal.

To prolong the flowering season for floss flowers frequent deadheading is a necessity.

Popular Varieties of Ageratum

Some popular varieties of ageratum include

Adriatic Compact, 15-20cm, mid-blue flowers
Blue Bouquet

A giant, up to 45cm, lavender/blue blooms, suitable for cutting

Blue Champion Vigorous and compact, 15cm, clusters of blue flowers
Blue Danube Early flowering, 15-20cm, lavender/blue blooms
Blue Horizon Tall, 60cm, small purple/blue blossoms, suitable for cutting
Blue Mink Compact, 23-30cm, powder blue blooms
Blue Ribbon Early bloomer, 15-20cm, mid-blue flowers
Blue Swords Bushy, 20cm, mid-blue flowers
Capri Compact, 20-30cm, deep blue blooms
Highness Tall, 60cm, white to pale pink blossoms, suitable for cutting
North Sea Long flowering, 15-20cm, deep blue or red flowers
Pacific Fast growing, dome shaped blossoms, 20cm, deep mauve flowers
Southern Cross Bi-coloured, 20-30cm, pale blue and white, suitable for cutting
Summer Snow Tall, 15-20cm, pure white blooms

Ageratum Pests and Diseases

Floss flowers are susceptible to foot and root rot which may lead to collapse of individual plants.

Height 30 - 45cm

Ageratum - Scientific Classification

Planting distance: Dwarfs 23cm / Other 30cm Kingdom Plantae
Flowers from early summer until first hard frost Order Asterales
Any moisture retentive soil Family Asteraceae
Sunny sheltered position / lightly shaded Genus Ageratum
Half-hardy annual    
Flowers Index Cornflower Hyacinth Pot Marigold
African Daisy Crocus Lily Primula
Ageratum Daffodil Lily of the Valley Snapdragon
Alstroemeria Dahlia Lobelia Snowdrop
Anemone Daisy Marigold Stock
Babys Breath Delphinium Pansy Sunflower
Begonia Forget-me-Not Pelargonium Sweet Alyssum
Bells of Ireland Freesia Petunia Sweet Pea
Busy Lizzie Gladiolus Phlox Tulip
Chrysanthemum Hollyhock Poppy Wallflower

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