THE GROWING WORLD OF DAHLIAS
Collerette dahlias have blooms with a single outer ring of generally flat ray florets, which must overlap, with a ring of small florets (the collar) the centre forming a disc.
This variety is Mariposa.
The following list includes the varieties listed by the NDS in 2018.
The upper case colour is the colour of the ray florets, the lower case is the colour of the collar.
(Lil.) indicates a lilliput dahlia, which is usually less than 15 inches (45cms) in height and with flowers not normally bigger than 2 inch diameter.
(Dw.B.) indicates a dwarf bedding variety which does not normally exceed 24 inches (60cms) in height
C. indicates suitable as a cut flower, ie it has long wiry stems.
E. indictes the variety is suitable for exhibition purposes.
G. indictes suitable for general garden use.
P. indicates the variety is suitable for growing in pots or patio containers.
Some examples of Collerette dahlias
Evolution of Collerette Dahlias
There are two types of petal in collerette dahlias. One type is flat with round ends as found in varieties like Amgard Louise and Amgard Embers, while others have more pointed petals, such as Elizabeth Snowden and Fashion Monger. A few British raisers have concentrated on this type of dahlias and have developed some interesting combinations.
The more pointed petals have continued to be involute and there are two varieties (not yet released) that can be described as Star Collerettes as their petals have the characteristics of star or orchid flowered dahlias. One of these is my own which is around 7 inches in diameter and self coloured, and the other was raised by Les Jackson of Carlisle. This has different colours on the front and back of the petals giving a very distinctive look to the bloom.
I have developed a collerette with fimbriated petals, and don't know of any others in the world at present.
A further development is the arrival of a collerette which is scented. It was raised by Les Jackson and is called Hillcrest Fragrant.
During his hybridising of collerettes, Ivor Kitchener has produced some double layered collerettes, a throwback to the first five decades of the 1900's.
Ivor Kitchener has done a significant amount of work on hybridising collerettes and produced a study for the RHS which is published on this site. Ivor's collerettes tend to be larger than most and are frequently around 6 inches in diameter.
Last Updated November 25, 2017
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