Single flowered dahlias represent arguably the most simple and purest of form of this beautiful flower. A single type dahlia has a characteristic open centred disc which comprises of tiny florets in the middle of the flower. Petals will usually form one row around the centre, although there can occasionally be two rows and the petals can also overlap.
Single dahlias are usually quite small, with flowers commonly being about 4 inches or 10 cm across. There are also mignon varieties of single dahlia that have even smaller flower heads. These will usually be about 2 inches or 5 cm in width.
Examples of single dahlias include the following varieties
Dahlia Omo – pale white petals with a central yellow disc. The stems and leaves are dark green and the plant produces a very good crop of flowers and requires very little care, making this an ideal choice for a novice dahlia gardener. Flowers can grow to 40 cm tall (about 15 inches).
Preston Park – this is a stunning dwarf bedding dahlia that has an almost black stem and foliage. The flowers are a bright scarlet and the centre is purple, with yellow anthers forming a ring around it. This dahlia reaches a height of 45 cm (18 inches) and flowers are 2 inches or 5 cm wide.
Dahlia Harvest Amanda – the flower is orange in colour, with green foliage and used in herbaceous borders or as a bedding plant. This dahlia grows to a height of 50 cm (20 inches).